1an uncastrated male bovine animal: [as modifier]:bull calves a large male animal, especially a whale or elephant.
) the zodiacal sign or constellation Taurus.
2British a bullseye: aim for the bull!
3 Stock Exchange a person who buys shares hoping to sell them at a higher price later. Often contrasted with bear2. 1 [with object and adverbial of direction] informal push or move powerfully or violently:he bulled the motor cycle clear of the tunnel
2 [no object]
) (of a cow) behave in a manner characteristic of being on heat.