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one
1[ wuhn ]
adjective
- being or amounting to a single unit or individual or entire thing, item, or object rather than two or more; a single:
one woman;
one nation;
one piece of cake.
- being a person, thing, or individual instance or member of a number, kind, group, or category indicated:
one member of the party.
- existing, acting, or considered as a single unit, entity, or individual.
- of the same or having a single kind, nature, or condition: We are of one resolve.
We belong to one team.
We are of one resolve.
- noting some indefinite day or time in the future:
You will see him one day.
- a certain (often used in naming a person otherwise unknown or undescribed):
One John Smith was chosen.
- being a particular, unique, or only individual, item, or unit:
I'm looking for the one adviser I can trust.
- noting some indefinite day or time in the past:
We all had dinner together one evening last week.
- of no consequence as to the character, outcome, etc.; the same:
It's all one to me whether they go or not.
noun
- the first and lowest whole number, being a cardinal number; unity.
- a symbol of this number, as 1 or I.
- a single person or thing:
If only problems would come one at a time!
- a die face or a domino face having one pip.
- a one-dollar bill:
to change a five-dollar bill for five ones.
- One. Philosophy. (in Neoplatonism ) the ultimate reality, seen as a central source of being by whose emanations all entities, spiritual and corporeal, have their existence, the corporeal ones containing the fewest of the emanations.
pronoun
- a person or thing of a number or kind indicated or understood:
one of the Elizabethan poets.
- (in certain pronominal combinations) a person unless definitely specified otherwise:
every one.
- (with a defining clause or other qualifying words) a person or a personified being or agency: the one I love.
the evil one;
the one I love.
- any person indefinitely; anyone:
One's score is never as good as one would desire.
- Chiefly British. (used as a substitute for the pronoun I):
Mother had been ailing for many months, and one should have realized it.
- a person of the speaker's kind; such as the speaker's own self:
to press one's own claims.
- something or someone of the kind just mentioned: Your teachers this semester seem to be good ones.
The portraits are fine ones.
Your teachers this semester seem to be good ones.
- something available or referred to, especially in the immediate area: The bar is open, so have one on me!
Here, take one—they're delicious.
The bar is open, so have one on me!
-one
2- a suffix used in the names of ketones and analogous chemical compounds:
lactone; quinone.
one
1/ wʌn /
determiner
- single; lone; not two or more
one car
- ( as pronoun )
one at a time
one is enough for now
- ( in combination )
one-eyed
one-legged
- distinct from all others; only; unique
one girl in a million
- ( as pronoun )
one of a kind
- a specified (person, item, etc) as distinct from another or others of its kind
raise one hand and then the other
- ( as pronoun )
which one is correct?
- a certain, indefinite, or unspecified (time); some
one day you'll be sorry
- informal.
it was one hell of a fight
- a certain (person)
one Miss Jones was named
- in one or all in onecombined; united
- all one
- all the same
- of no consequence
it's all one to me
- at oneoften foll by with in a state of agreement or harmony
- be made one(of a man and a woman) to become married
- many a onemany people
- neither one thing nor the otherindefinite, undecided, or mixed
- never a onenone
- one and alleveryone, without exception
- one by oneone at a time; individually
- one or twoa few
- one way and anotheron balance
- off on one informal.exhibiting bad temper; ranting
- one with anotheron average
pronoun
- an indefinite person regarded as typical of every person
one can't say any more than that
- any indefinite person: used as the subject of a sentence to form an alternative grammatical construction to that of the passive voice
one can catch fine trout in this stream
- archaic.an unspecified person
one came to him
noun
- the smallest whole number and the first cardinal number; unity See also number
- a numeral (1, I, i, etc) representing this number
- informal.a joke or story (esp in the one about )
- music the numeral 1 used as the lower figure in a time signature to indicate that the beat is measured in semibreves
- something representing, represented by, or consisting of one unit
- Also calledone o'clock one hour after noon or midnight
- a blow or setback (esp in the phrase one in the eye for )
- the one(in Neo-Platonic philosophy) the ultimate being
- the Holy One or the One aboveGod
- the Evil OneSatan; the devil
-one
2suffix forming nouns
- indicating that a chemical compound is a ketone
acetone
–one
- A suffix used to form the names of chemical compounds containing an oxygen atom attached to a carbon atom, such as acetone.
Grammar Note
Word History and Origins
Origin of one1
Origin of one2
Word History and Origins
Origin of one1
Origin of one2
Idioms and Phrases
- at one,
- in a state of agreement; of one opinion.
- united in thought or feeling; attuned.
He felt at one with his Creator.
- one and all, everyone:
They came, one and all, to welcome him home.
- one by one, singly and successively:
One by one the children married and moved away.
- one for the road. road ( def 10 ).
More idioms and phrases containing one
- all in one piece
- all the same (one)
- A-1 (A-one)
- as one
- at one
- at one stroke
- at one time
- at one time or another
- back to the drawing board (square one)
- each and every (last one)
- each other (one another)
- fast one
- for one, 1
- go one better
- hang (one) on
- harp on (one string)
- hole in one
- in one ear and out the other
- in the same (in one) breath
- irons in the fire, more than one
- it takes one to know one
- just one of those things
- look out for (number one)
- more than one way to skin a cat
- not one iota
- number one
- on the one hand
- (one) picture is worth a thousand words
- put all one's eggs in one basket
- quick one
- seen one, seen them all
- six of one, half dozen of the other
- that's one on me
- tie one on
- wear another (more than one) hat
- with one arm tied behind one's back
- with one voice
- words of one syllable
Example Sentences
However, one of their potential side effects is cardiomyopathy, a disease of the heart muscle that makes it harder for the heart to pump blood to the rest of the body.
One particular SPT subunit stood out to the researchers as the subject of future research, since the team suspects it is responsible for selectively spitting dangerous lipids out of the liver.
About one third of the participants in the studies were females, an increase of nearly three-fold from previous studies.
One amendment suggested by Councilmember John Lee would delay the jump to a $25 hourly minimum wage until six months after occupancy rates at hotels and LAX passenger traffic had returned to pre-pandemic levels.
Zendaya and Sydney Sweeney penned tributes to their Euphoria co-star, Angus Cloud, one day after the actor died at 25.
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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.
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