Question

full definition of bull

Answer 1

Definition of bull. 1 a : a male bovine; especially : an adult uncastrated male domestic bovine. b : a usually adult male of various large animals (such as elephants, whales, or seals) 2 : one who buys securities or commodities in expectation of a price rise or who acts to effect such a rise — compare bear.

Answer 2

a bull is male and an oxen is female.
so opposite gender of ox is bull