<p><strong>Noun</strong></p><ul><li>(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.</li><li>the inhabitants of this planet, especially the human inhabitants: The whole earth rejoiced.</li><li>this planet as the habitation of humans, often in contrast to heaven and hell: to create a hell on earth.</li><li>the surface of this planet: to fall to earth.</li><li>the solid matter of this planet; dry land; ground.</li><li>soil and dirt, as distinguished from rock and sand; the softer part of the land.</li><li>the hole of a burrowing animal; lair.</li><li>Chemistry: any of several metallic oxides that are difficult to reduce, as alumina, zirconia, and yttria.</li><li>Compare alkaline earth, rare earth.</li><li>Also called earth color: any of various pigments consisting chiefly of iron oxides and tending toward brown in hue.</li><li>Chiefly British Electronics: a ground.</li><li>Archaic: a land or country.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) Chiefly British Electronics: to ground.</li></ul>