Source : Webster's Revised Unabridged Dictionary (1913)

Bullock \Bul"lock\, n. [AS. bulluc a young bull. See {Bull}.]
   1. A young bull, or any male of the ox kind.

            Take thy father's young bullock, even the second
            bullock of seven years old.           --Judges vi.
                                                  25.

   2. An ox, steer, or stag.

Bullock \Bul"lock\, v. t.
   To bully. [Obs.]

         She shan't think to bullock and domineer over me.
                                                  --Foote.

Source : WordNet®

bullock
     n 1: young bull
     2: castrated bull [syn: {steer}]