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  • earth
    earth
    noun
    the planet third in order from the sun, having an equatorial diameter of 7,926 miles (12,755 km) and a polar diameter of 7,900 miles (12,714 km), a mean distance from the sun of 92.9 million miles (149.6 million km), and a period of revolution of 365.26 days, and having one satellite.
  • Earth
    Earth
    The planet on which we live — the third planet from the sun.
Synonyms

earth

American  
[urth] / ɜrθ /

noun

  • earths
    plural
  1. (often initial capital letter) the planet third in order from the sun, having an equatorial diameter of 7,926 miles (12,755 km) and a polar diameter of 7,900 miles (12,714 km), a mean distance from the sun of 92.9 million miles (149.6 million km), and a period of revolution of 365.26 days, and having one satellite.

  2. the inhabitants of this planet, especially the human inhabitants.

    The whole earth rejoiced.

  3. this planet as the habitation of humans, often in contrast to heaven and hell.

    to create a hell on earth.

  4. the surface of this planet.

    to fall to earth.

  5. the solid matter of this planet; dry land; ground.

  6. soil and dirt, as distinguished from rock and sand; the softer part of the land.

  7. the hole of a burrowing animal; lair.

  8. Chemistry. any of several metallic oxides that are difficult to reduce, as alumina, zirconia, and yttria.

  9. Also called earth colorFine Arts. any of various pigments consisting chiefly of iron oxides and tending toward brown in hue.

  10. Chiefly British Electronics. a ground.

  11. Archaic. a land or country.


verb (used with object)

  • earths,
    present (3rd person singular)
  • earthed,
    past participle,  past
  • earthing
    present participle
  1. Chiefly British Electronics. to ground.

idioms

  1. run to earth,

    1. Hunting. to chase (an animal) into its hole or burrow.

      to run a fox to earth.

    2. to search out; track down.

      They ran the fugitive to earth in Algiers.

  2. move heaven and earth. heaven.

  3. on earth, in the world.

    Where on earth have you been?

earth British  
/ ɜːθ /

noun

  1. (sometimes capital) the third planet from the sun, the only planet on which life is known to exist. It is not quite spherical, being flattened at the poles, and consists of three geological zones, the core, mantle, and thin outer crust. The surface, covered with large areas of water, is enveloped by an atmosphere principally of nitrogen (78 per cent), oxygen (21 per cent), and some water vapour. The age is estimated at over four thousand million years. Distance from sun: 149.6 million km; equatorial diameter: 12 756 km; mass: 5.976 × 10 24 kg; sidereal period of axial rotation: 23 hours 56 minutes 4 seconds; sidereal period of revolution about sun: 365.256 days

  2. the inhabitants of this planet

    the whole earth rejoiced

  3. the dry surface of this planet as distinguished from sea or sky; land; ground

  4. the loose soft material that makes up a large part of the surface of the ground and consists of disintegrated rock particles, mould, clay, etc; soil

  5. worldly or temporal matters as opposed to the concerns of the spirit

  6. the hole in which some species of burrowing animals, esp foxes, live

  7. chem See rare earth alkaline earth

    1. a connection between an electrical circuit or device and the earth, which is at zero potential

    2. US and Canadian equivalent: ground.  a terminal to which this connection is made

  8. Also called: earth colour.  any of various brown pigments composed chiefly of iron oxides

  9. (modifier) astrology of or relating to a group of three signs of the zodiac, Taurus, Virgo, and Capricorn Compare air fire water

  10. informal to be very expensive

  11. to return to reality from a fantasy or daydream

  12. used as an intensifier in such phrases as what on earth , who on earth , etc

    1. to hunt (an animal, esp a fox) to its earth and trap it there

    2. to find (someone) after searching

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (intr) (of a hunted fox) to go to ground

  2. (tr) to connect (a circuit, device, etc) to earth

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Earth Cultural  
  1. The planet on which we live — the third planet from the sun.


earth More Idioms  

Usage

What does earth mean? Earth with a capital E refers to the third planet from our sun, as in Mars fascinates me, but Earth will always be my home. Lowercased, earth most often refers to the surface material of our planet, including rock, soil, and dirt, as in The bulldozer moved so much earth out of the building lot that if I jumped in the hole, I couldn’t get out again. Earth can also refer to the entire human population, representing the Earth as a planet of people, rather than a giant rock floating in space, as in The whole earth was worried about COVID-19. Example: Earth revolves around the sun about every 365 days.

Synonym Usage

Earth, globe, world are terms applied to the planet on which we dwell. Earth is used especially in speaking of a condition of existence contrasted with that in heaven or hell: those who are yet on earth. Globe formerly emphasized merely the roundness of the earth: to circumnavigate the globe. It is now used more like world, with especial application to the inhabitants of the earth and their activities, interests, and concerns. In this sense, both globe and world are more inclusive than earth and are used more abstractly: the politics of the globe; the future of the world; One World.

Discover More

It consists of an inner core made of iron and nickel, an outer core of liquid metal, a mantle, and, on the outside, a crust.

On the Earth's surface, the oceans and the continents form the stage on which the evolution of life takes place. The atmosphere above the surface circulates, producing the daily weather.

The Earth was formed at the same time as the sun, about 4.6 billion years ago.

The surface of the solid Earth is in a state of constant change as the rock is moved around by the processes of plate tectonics.

Other Word Forms

Inflected Forms

Nouns

Participles

Conjugated Forms

Present

Past

Future

Etymology

Origin of earth

First recorded before 950; Middle English erthe, Old English eorthe; cognate with German Erde, Dutch aarde, Old Norse jǫrth, Danish jord, Gothic airtha

Explanation

Earth is our home planet, the third from the sun. Life on earth is possible because of its particular climate and the presence of water. Earth is the most familiar of the planets, being the one we live on. You can also use the word to talk about the earth you stand on — it's the non-liquid part of our planet, the solid ground. It's also another word for "dirt" or "soil." The Old English root, eorþe also had a double meaning, both "ground or soil" and "the material world" or "the abode of man," as opposed to the heavens.

Keep Reading on Vocabulary.com

Vocabulary lists containing earth

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

“I expect investors to come back down to earth and start pricing the macroeconomic environment into equity valuations once again.”

From MarketWatch Sep. 2, 2026

America is the only country on earth that organized itself this way, but as Wood pointed out, we had no choice.

From Salon Aug. 30, 2026

Here the airborne concrete terraces above were anchored to the earth, reconciling the products of the machine with nature, making Fallingwater the definitive example of what Wright called his “organic architecture.”

From The Wall Street Journal Aug. 28, 2026

“Your journey on this earth may have come to an end, but your light will continue to shine.”

From Los Angeles Times Aug. 27, 2026

As I walked along the country road leading my pony, no boy on earth could have been happier.

From "Summer of the Monkeys" by Wilson Rawls

It certainly looks like no other museum on Earth.

From Los Angeles Times Sep. 2, 2026

That means the young Sun's violent activity may have done more than prevent Earth from freezing.

From Science Daily Sep. 2, 2026

The contradiction between a relatively warm early Earth and a cooler, dimmer Sun is known as the Faint Young Sun paradox.

From Science Daily Sep. 2, 2026

The solar system's movement through the Milky Way may have exposed Earth to changing interstellar environments capable of influencing its climate.

From Science Daily Sep. 2, 2026

The pellets of uranium will be as old as Earth is now before half of the uranium 238 atoms have emitted radiation.

From "Meltdown" by Deirdre Langeland

Washington is likely to be wary of potential retaliation from Beijing, which processes the majority of the world's rare earths and other critical minerals, crucial in the manufacture of many high-tech products.

From BBC Aug. 25, 2026

Beijing has already tightened export controls on rare earths as part of previous trade negotiations with the US.

From BBC Aug. 25, 2026

About 10 years ago, university researchers discovered that the wastewater from shuttered mines contained rare earths.

From Barron's Aug. 22, 2026

While the Belgian-French chemical company’s soda ash business has limited growth prospects and seaborne soda ash shows no sign of recovery, the company could potentially profit from rare earths.

From The Wall Street Journal Aug. 21, 2026

Bruno was right—the universe was infinite and there were other earths; and Kepler, who had always insisted that the sun and the Earth were unique, was plain wrong.

From "The Invention of Science" by David Wootton

They are earthed in this big moment, respectful of the tradition they are now associated with, the tradition of Washington’s special friends being drawn to the nation’s bosom.

From The Guardian Sep. 27, 2019

Far from having their heads in the clouds, they feel earthed.

From The New Yorker Jun. 22, 2018

It would be easy to get away with a sense of Laura Linney as all sweetness and light – but she is, I think, complicatedly earthed.

From The Guardian May 27, 2018

Each of the sonatas is echt-Argerich: totally unpredictable from note to note, they fly like the most charming, sensual kite imaginable, ecstatically free and yet still earthed.

From New York Times Dec. 4, 2014

And that mention of the Medic brought them back to the problem which had earthed them.

From Plague Ship by Andre Norton

It added that it had existing lightning and earthing protection on its biogas tanks.

From BBC Oct. 5, 2023

He started earthing under the guidance of then-Orioles strength coach Trevor Howell - “before there was much info on it.”

From Washington Times Jul. 13, 2023

San Francisco’s Joc Pederson also counts on constant support from Martin and is committed to breath work and earthing.

From Washington Times Jul. 13, 2023

“So, earthing — I don’t actually know that much about earthing,” Paltrow admitted.

From Salon Jun. 6, 2017

The next process is "scraping;" in other words, thinning out and earthing up the plants, so as to leave each in the centre of a little hill, some two feet distant from its nearest neighbors.

From Cotton, Its Progress from the Field to the Needle Being a brief sketch of the culture of the plant, its picking, cleaning, packing, shipment, and manufacture by Anonymous

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