(1):

(n.) An animal of the genus Bos, especially the common species, B. taurus, including the bull, cow, and ox, in their full grown state; esp., an ox or cow fattened for food.

(2):

(n.) The flesh of an ox, or cow, or of any adult bovine animal, when slaughtered for food.

(3):

(n.) Applied colloquially to human flesh.

(4):

(a.) Of, pertaining to, or resembling, beef.