I.earth opp. to heaven, or land opp. to sea, Hom., etc.; κατὰ γῆν on land, by land, Thuc.; κατὰ γῆς Xen.:— ἐπὶ γῆς on earth, Soph.; κατὰ γῆς below the earth, Trag.:—the gen. with local adverbs, ἵνα γῆς, ποῦ γῆς, ubi terrarum, where in (in what quarter of) the world, where on earth, Soph., etc.
2.earth, as an element, opp. to air, water, fire, Plat.
III.the earth or ground as tilled, Soph., Plat.