light
1 Americannoun
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something that makes things visible or affords illumination.
All colors depend on light.
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Physics.
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Also called radiant energy. Also called luminous energy. electromagnetic radiation to which the organs of sight react, ranging in wavelength from about 400 to 700 nanometers and propagated at a speed of 186,282 miles per second (299,972 kilometers per second), considered variously as a wave, a stream of particles, or a quantum phenomenon.
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a similar form of radiant energy that does not affect the retina, as ultraviolet or infrared rays.
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the sensation produced by stimulation of the organs of sight.
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an illuminating agent or source, as the sun, a lamp, or a beacon.
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the radiance or illumination from a particular source.
the light of a candle.
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the illumination from the sun; daylight.
We awoke at the first light.
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daybreak or dawn.
when light appeared in the east.
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daytime.
Summer has more hours of light.
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a particular light or illumination in which an object seen takes on a certain appearance.
viewing the portrait in dim light.
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a device for or means of igniting, as a spark, flame, or match.
Could you give me a light?
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a traffic light.
Don't cross till the light changes.
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the aspect in which a thing appears or is regarded.
Try to look at the situation in a more cheerful light.
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the state of being visible, exposed to view, or revealed to public notice or knowledge; limelight.
Stardom has placed her in the light.
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a person who is an outstanding leader, celebrity, or example; luminary.
He became one of the leading lights of Restoration drama.
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Art.
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the effect of light falling on an object or scene as represented in a picture.
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one of the brightest parts of a picture.
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a gleam or sparkle, as in the eyes.
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a measure or supply of light; illumination.
The wall cuts off our light.
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spiritual illumination or awareness; enlightenment.
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Architecture.
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Also called day. one compartment of a window or window sash.
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a window, especially a small one.
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mental insight; understanding.
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lights, the information, ideas, or mental capacities possessed.
to act according to one's lights.
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a lighthouse.
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Archaic. the eyesight.
adjective
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having light or illumination; bright; well-lighted.
the lightest room in the entire house.
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pale, whitish, or not deep or dark in color.
a light blue.
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(of coffee or tea) containing enough milk or cream to produce a light color.
verb (used with object)
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to set burning, as a candle, lamp, fire, match, or cigarette; kindle; ignite.
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to turn or switch on (an electric light).
One flick of the master switch lights all the lamps in the room.
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to give light to; furnish with light or illumination.
The room is lighted by two large chandeliers.
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to make (an area or object) bright with or as if with light (often followed byup ).
Hundreds of candles lighted up the ballroom.
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to cause (the face, surroundings, etc.) to brighten, especially with joy, animation, or the like (often followed byup ).
A smile lit up her face. Her presence lighted up the room.
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to guide or conduct with a light.
a candle to light you to bed.
verb (used without object)
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to take fire or become kindled.
The damp wood refused to light.
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to ignite a cigar, cigarette, or pipe for purposes of smoking (usually followed byup ).
He took out a pipe and lighted up before speaking.
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to become illuminated when switched on.
This table lamp won't light.
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to become bright, as with light or color (often followed byup ).
The sky lights up at sunset.
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to brighten with animation or joy, as the face or eyes (often followed byup ).
idioms
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hide one's light under a bushel, to conceal or suppress one's talents or successes.
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in a good / bad light, under favorable (or unfavorable) circumstances.
She worshiped him, but then she'd only seen him in a good light.
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see the light,
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to come into existence or being.
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to be made public.
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to begin to accept or understand a point of view one formerly opposed.
Her father was opposed to her attending an out-of-town college, but he finally saw the light.
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bring to light, to discover or reveal.
The excavations brought to light the remnants of an ancient civilization.
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in (the) light of, taking into account; because of; considering.
It was necessary to review the decision in the light of recent developments.
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come to light, to be discovered or revealed.
Some previously undiscovered letters have lately come to light.
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light at the end of the tunnel, a prospect of success, relief, or redemption.
We haven't solved the problem yet, but we're beginning to see light at the end of the tunnel.
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shed / throw light on, to clarify; clear up.
His deathbed confession threw light on a mystery of long standing.
adjective
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of little weight; not heavy.
a light load.
- Antonyms:
- heavy
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of little weight in proportion to bulk; of low specific gravity.
a light metal.
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of less than the usual or average weight.
light clothing.
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weighing less than the proper or standard amount.
to be caught using light weights in trade.
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of small amount, force, intensity, etc.: a light rain;
light trading on the stock market;
a light rain;
light sleep.
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using or applying little or slight pressure or force.
The child petted the puppy with light, gentle strokes.
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not distinct; faint.
The writing on the page had become light and hard to read.
- Synonyms:
- faded, indistinct
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easy to endure, deal with, or perform; not difficult or burdensome.
light duties.
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not very profound or serious; amusing or entertaining.
light reading.
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of little importance or consequence; trivial.
The loss of his job was no light matter.
- Synonyms:
- inconsiderable, trifling
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easily digested.
light food.
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low in any substance, as sugar, starch, or tars, that is considered harmful or undesirable.
light cigarettes.
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(of alcoholic beverages)
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not heavy or strong.
a light apéritif.
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(especially of beer and wine) having fewer calories and usually a lower alcohol content than the standard product.
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spongy or well-leavened, as cake.
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(of soil) containing much sand; porous or crumbly.
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slender or delicate in form or appearance.
a light, graceful figure.
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airy or buoyant in movement.
When she dances, she's as light as a feather.
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nimble or agile.
light on one's feet.
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free from trouble, sorrow, or worry; carefree.
a light heart.
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a light laugh.
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characterized by lack of proper seriousness; frivolous.
light conduct.
- Synonyms:
- flighty
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sexually promiscuous; loose.
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easily swayed; changeable: volatile.
a heart light of love;
His is a life of a man light of purpose.
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slightly delirious; dizzy.
I get light on one martini.
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Military. lightly armed or equipped.
light cavalry.
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having little or no cargo, encumbrance, or the like; not burdened.
a light freighter drawing little water.
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adapted by small weight or slight build for small loads or swift movement.
The grocer bought a light truck for deliveries.
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using small-scale machinery primarily for the production of consumer goods.
light industry.
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Nautical. noting any sail of light canvas set only in moderate or calm weather, as a royal, skysail, studdingsail, gaff topsail, or spinnaker.
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Meteorology. (of wind) having a speed up to 7 miles per hour (3 meters per second).
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Phonetics. (of l- sounds) resembling a front vowel in quality; clear.
French l is lighter than English l.
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Prosody. (of a syllable)
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Poker. being in debt to the pot.
He's a dollar light.
adverb
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with few or no suitcases; lightly.
to travel light.
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with no load or cargo hauled or carried.
a locomotive running light to its roundhouse.
noun
idioms
verb (used without object)
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to get down or descend, as from a horse or a vehicle.
As she lighted, the journalists began shouting questions at her.
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to come to rest, as on a spot or thing; fall or settle upon; land.
The bird lighted on the branch. My eye lighted on some friends in the crowd.
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to come by chance; happen; hit (usually followed by on orupon ).
to light on a clue; to light on an ideal picnic spot.
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to fall, as a stroke, weapon, vengeance, or choice, on a place or person.
The choice lighted upon our candidate.
verb phrase
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light into to make a vigorous physical or verbal attack on.
He would light into anyone with the slightest provocation.
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light out to leave quickly; depart hurriedly.
He lit out of here as fast as his legs would carry him.
noun
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God regarded as a source of illuminating grace and strength
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Quakerism short for Inner Light
noun
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the medium of illumination that makes sight possible
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Also called: visible radiation. electromagnetic radiation that is capable of causing a visual sensation and has wavelengths from about 380 to about 780 nanometres
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(not in technical usage) electromagnetic radiation that has a wavelength outside this range, esp ultraviolet radiation
ultraviolet light
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the sensation experienced when electromagnetic radiation within the visible spectrum falls on the retina of the eye
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anything that illuminates, such as a lamp or candle
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See traffic light
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a particular quality or type of light
a good light for reading
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illumination from the sun during the day; daylight
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the time this appears; daybreak; dawn
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anything that allows the entrance of light, such as a window or compartment of a window
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the condition of being visible or known (esp in the phrases bring or come to light )
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an aspect or view
he saw it in a different light
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mental understanding or spiritual insight
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a person considered to be an authority or leader
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brightness of countenance, esp a sparkle in the eyes
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the act of igniting or kindling something, such as a cigarette
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something that ignites or kindles, esp in a specified manner, such as a spark or flame
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something used for igniting or kindling, such as a match
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See lighthouse
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the effect of illumination on objects or scenes, as created in a picture
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an area of brightness in a picture, as opposed to shade
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a poetic or archaic word for eyesight
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the answer to a clue in a crossword
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in view of; taking into account; considering
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hope for the ending of a difficult or unpleasant situation
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quickly asleep or unconscious
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to gain sudden insight into or understanding of something
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to experience a religious conversion
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to come into being
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to come to public notice
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to clarify or supply additional information on
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to stand so as to obscure a person's vision
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(verb) to ignite something, esp a match, by friction
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(interjection) an exclamation of surprise
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adjective
verb
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to ignite or cause to ignite
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(often foll by up) to illuminate or cause to illuminate
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to make or become cheerful or animated
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(tr) to guide or lead by light
adjective
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not heavy; weighing relatively little
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having relatively low density
magnesium is a light metal
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lacking sufficient weight; not agreeing with standard or official weights
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not great in degree, intensity, or number
light rain
a light eater
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without burdens, difficulties, or problems; easily borne or done
a light heart
light work
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graceful, agile, or deft
light fingers
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not bulky or clumsy
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not serious or profound; entertaining
light verse
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without importance or consequence; insignificant
no light matter
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frivolous or capricious
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loose in morals
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dizzy or unclear
a light head
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(of bread, cake, etc) spongy or well leavened
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easily digested
a light meal
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relatively low in alcoholic content
a light wine
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(of a soil) having a crumbly texture
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designed to carry light loads
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not loaded
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carrying light arms or equipment
light infantry
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(of an industry) engaged in the production of small consumer goods using light machinery Compare heavy
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aeronautics (of an aircraft) having a maximum take-off weight less than 5670 kilograms (12 500 pounds)
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chem (of an oil fraction obtained from coal tar) having a boiling range between about 100° and 210°C
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(of a railway) having a narrow gauge, or in some cases a standard gauge with speed or load restrictions not applied to a main line
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bridge
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(of a bid) made on insufficient values
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(of a player) having failed to take sufficient tricks to make his contract
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phonetics prosody (of a syllable, vowel, etc) unaccented or weakly stressed; short Compare heavy See also light 1
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phonetics the least of three levels of stress in an utterance, in such languages as English
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informal lacking a sufficient quantity of (something)
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to treat as insignificant or trifling
adverb
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a less common word for lightly
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with little equipment, baggage, etc
to travel light
verb
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(esp of birds) to settle or land after flight
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to get down from a horse, vehicle, etc
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to come upon unexpectedly
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to strike or fall on
the choice lighted on me
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Electromagnetic radiation that can be perceived by the human eye. It is made up of electromagnetic waves with wavelengths between 4 × 10 - 7 and 7 × 10 - 7 meters. Light, and all other electromagnetic radiation, travels at a speed of about 299,728 km (185,831 mi) per second in a vacuum.
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See also photon
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Electromagnetic energy of a wavelength just outside the range the human eye can detect, such as infrared light and ultraviolet light.
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See Note at electromagnetic radiation
Other Word Forms
- lightful adjective
- lightfully adverb
- lightish adjective
- lightless adjective
- lightly adverb
- lightness noun
Etymology
Origin of light1
First recorded before 900; (noun and adjective) Middle English; Old English lēoht; cognate with Old Saxon lioht, Old Frisian liacht, Dutch, German licht, Gothic liuhath (noun); akin to Old Norse ljōs (noun), ljōss (adjective), Latin lūx (noun), Greek leukós “bright, white”; (verb) Middle English lighten, Old English līhtan, cognate with Old Saxon liuhtian, Old High German liuhten ( German leuchten ), Gothic liuhtjan
Origin of light2
First recorded before 900; Middle English; Old English lēoht, līht; cognate with Old Frisian li(u)cht, Old Saxon -līht, Dutch licht, German leicht, Old Norse lēttr, Gothic leihts
Origin of light3
First recorded before 900; Middle English lihten, Old English līhtan “to make light, relieve of a weight”; light 2
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.