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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:

But as the impact of a changing climate is felt in repeated heatwaves, droughts and wildfires this summer, how can we fly around the world without costing the earth?

From BBC Jul. 21, 2026

The Pacific island had been the self-proclaimed last nation on earth without a football team, but Nauru have also been claiming this tag.

From BBC Jul. 21, 2026

Optical-networking stocks have come back down to earth in recent months, and a Barclays analyst thinks that Lumentum Holdings shares now look attractive in the wake of their selloff.

From MarketWatch Jul. 20, 2026

“The outpouring of love I received helped me to realize that her short time on this earth left an impact that could never be forgotten.”

From Slate Jul. 19, 2026

“I think the earth takes care of us.”

From "Ida B" by Katherine Hannigan

Low Earth-orbit satellite networks are closer to Earth than traditional constellations, making them suitable to project low-latency broadband directly to smartphones in parts of the world where cell towers are unavailable.

From The Wall Street Journal Jul. 23, 2026

There's crashing back to Earth with a bang, and there's whatever Hearts fans have been going through since 16 May.

From BBC Jul. 21, 2026

As the Moon travels around Earth, it sometimes moves through the magnetosheath, a buffer region surrounding the magnetosphere.

From Science Daily Jul. 21, 2026

Tropical rainforests like the Amazon are home to millions of species, and in a healthy state they absorb vast quantities of planet-warming carbon dioxide, helping to keep the Earth cool.

From BBC Jul. 21, 2026

“Andrew? Earth to Andrew. You in there, buddy? Everything’s okay.”

From "Popcorn" by Rob Harrell

Rare earths are heavily used across ship technologies.

From The Wall Street Journal Jul. 17, 2026

The European Commission, which leads EU trade policy, is working on an instrument that would force businesses to diversify their suppliers in critical sectors like chips and rare earths.

From Barron's Jun. 29, 2026

The fight is emblematic of the cutthroat competition to establish an all-American supply chain for rare earths.

From The Wall Street Journal Jun. 29, 2026

It has used its war chest to announce acquisitions of Less Common Metals, a U.K.-based rare-earth-metal maker, and Serra Verde, which owns the Pela Ema mine in Brazil that produces highly coveted heavy rare earths.

From The Wall Street Journal Jun. 29, 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

When the two first leaves are fully developed the plants to be earthed up as high as the cotyledons.

From In-Door Gardening for Every Week in the Year Showing the Most Successful Treatment for all Plants Cultivated in the Greenhouse, Conservatory, Stove, Pit, Orchid, and Forcing-house by Keane, William

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

Propagate by slips, or by earthing up the old stems, the various pot-herbs.

From Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 7 "Horticulture" to "Hudson Bay" by Various

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