[urth] 
| 1. | (often initial capital letter ) the planet third in order from the sun, having an equatorial diameter of 7926 mi. (12,755 km) and a polar diameter of 7900 mi. (12,714 km), a mean distance from the sun of 92.9 million mi. (149.6 million km), and a period of revolution of 365.26 days, and having one satellite. |
| 2. | the inhabitants of this planet, esp. 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. Compare alkaline earth, rare earth. |
| 9. | Also called earth color. Fine 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. |
| 12. | Chiefly British Electronics. to ground. |
| 13. | move heaven and earth. heaven (def. 7). |
| 14. | on earth, in the world: Where on earth have you been? |
| 15. | run to earth,
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earth (ûrth)
n.
Any of several metallic oxides, such as alumina or zirconia, from which it is difficult to remove oxygen. No longer in technical use.
Earth (ûrth) Pronunciation Key
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