[ox] n, pl ox.en also ox [ME, fr. OE oxa; akin to OHG ohso ox, Skt uksa bull, and perh. to Skt uksati he moistens, Gk hygros wet--more at humor] (bef. 12c) 1: a domestic bovine mammal (Bos taurus); broadly: a bovine mammal
2: an adult castrated male domestic ox