Earth  —n. 1 a (also earth) the planet on which we live. B land and sea, as distinct from sky. 2 a the ground (fell to earth). B soil, mould. 3 relig. This world, as distinct from heaven or hell. 4 connection to the earth as the completion of an electrical circuit. 5 hole of a fox etc. 6 (prec. By the) colloq. Huge sum; everything (cost the earth; want the earth). —v. 1 cover (plant-roots) with earth. 2 connect (an electrical circuit) to the earth.  come back (or down) to earth return to realities. Gone to earth in hiding. On earth colloq. Existing anywhere; emphatically (the happiest man on earth; looked like nothing on earth; what on earth have you done?). Run to earth find after a long search.  earthward adj. & adv. Earthwards adv. [old english]