n. The adult male of the domestic Bos taurus, known in the natural state as a bull, whose female is a cow, and whose young is a calf; in a wider sense, an animal of the family Bovidæ and subfamily Bovinæ or Ovibovinæ; a bovine.n. In a restricted sense, the castrated male of Bos taurus, at least 4 years old and full-grown or nearly so. (See steer.) Such animals are most used as draft-animals and for beef.n. Same as ox-coin.