(often initial capital letter) the planet third in order from the sun, having an equatorial diameter of 7926 miles (12,755 km) and a polar diameter of 7900 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. See table under planet.
the inhabitants of this planet, especially the human inhabitants: The whole earth rejoiced.
this planet as the habitation of humans, often in contrast to heaven and hell: to create a hell on earth.
the surface of this planet: to fall to earth.
the solid matter of this planet; dry land; ground.
soil and dirt, as distinguished from rock and sand; the softer part of the land.
the hole of a burrowing animal; lair.
Chemistry. any of several metallic oxides that are difficult to reduce, as alumina, zirconia, and yttria. Compare alkaline earth, rare earth.
Also called earth color. Fine Arts. any of various pigments consisting chiefly of iron oxides and tending toward brown in hue.
Chiefly British Electronics. a ground.
Archaic. a land or country.
verb (used with object)
Chiefly British Electronics. to ground.
move heaven and earth. heaven ( def 7 ).
on earth, in the world: Where on earth have you been?
run to earth,
Hunting. to chase (an animal) into its hole or burrow: to run a fox to earth.
to search out; track down: They ran the fugitive to earth in Algiers.

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

3. 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. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
earth (ɜːθ)
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 × 1024 kg; sidereal period of axial rotation: 23 hours 56 minutes 4 seconds; sidereal period of revolution about sun: 365.256 daysRelated: terrestrial, tellurian, telluric, terrene
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 rare earth See alkaline earth
8.  a.  a connection between an electrical circuit or device and the earth, which is at zero potential
 b.  US and Canadian equivalent: ground a terminal to which this connection is made
9.  Also called: earth colour any of various brown pigments composed chiefly of iron oxides
10.  (modifier) astrology air fire Compare water of or relating to a group of three signs of the zodiac, Taurus, Virgo, and Capricorn
11.  informal cost the earth to be very expensive
12.  come back to earth, come down to earth to return to reality from a fantasy or daydream
13.  on earth used as an intensifier in such phrases as what on earth, who on earth, etc
14.  run to earth
 a.  to hunt (an animal, esp a fox) to its earth and trap it there
 b.  to find (someone) after searching
15.  (intr) (of a hunted fox) to go to ground
16.  (tr) to connect (a circuit, device, etc) to earth
Related: terrestrial, tellurian, telluric, terrene
[Old English eorthe; related to Old Norse jorth, Old High German ertha, Gothic airtha, Greek erā]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

O.E. eorðe "ground, soil, dry land," also used (along with middangeard) for "the (material) world" (as opposed to the heavens or the underworld), from P.Gmc. *ertho (cf. O.N. jörð, M.Du. eerde, O.H.G. erda, Goth. airþa), from PIE base *er-. The earth considered as a planet was so called
from c.1400.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

earth (ûrth)
Any of several metallic oxides, such as alumina or zirconia, from which it is difficult to remove oxygen. No longer in technical use.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
Earth  [%PREMIUM_LINK%]     (ûrth)  Pronunciation Key 
  1. The third planet from the Sun and the densest planet in the solar system. Earth is a terrestrial or inner planet consisting of a thin outer crust, an intermediate mantle, and a dense inner core. It has an atmosphere composed primarily of nitrogen and oxygen and is the only planet on which water in liquid form exists, covering more than 70 percent of its surface. It is also the only planet on which life is known to have evolved, occupying the relatively thin region of water, land, and air known as the biosphere. Earth has a single, relatively large natural satellite, the Moon. See more at atmosphere, core, crust, mantle. See Table at solar system.

  2. earth

  3. Electricity See ground.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

Earth definition

The planet on which we live — the third planet from the sun.

Note: The Earth was formed at the same time as the sun, about 4.6 billion years ago.
Note: 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.
Note: 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.
Note: 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 American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Bible Dictionary

Earth definition

(1.) In the sense of soil or ground, the translation of the word _adamah'_. In Gen. 9:20 "husbandman" is literally "man of the ground or earth." Altars were to be built of earth (Ex. 20:24). Naaman asked for two mules' burden of earth (2 Kings 5:17), under the superstitious notion that Jehovah, like the gods of the heathen, could be acceptably worshipped only on his own soil. (2). As the rendering of _'erets_, it means the whole world (Gen. 1:2); the land as opposed to the sea (1:10). _Erets_ also denotes a country (21:32); a plot of ground (23:15); the ground on which a man stands (33:3); the inhabitants of the earth (6:1; 11:1); all the world except Israel (2 Chr. 13:9). In the New Testament "the earth" denotes the land of Judea (Matt. 23:35); also things carnal in contrast with things heavenly (John 3:31; Col. 3:1, 2).

Easton's 1897 Bible Dictionary
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The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences for Earth
Stony is confused over the strange future, and then gets sent back to earth.
After many years of servitude, she is free to return to earth.
He was once healed by her power, and has followed clues about her to earth.
Sentient species humans appear to be mostly equivalent to humans on earth.
Image for Earth
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