1. noun /bʊl/
a) The adult male of certain large mammals, such as whales, elephants and seals.<!do not put "etc" here: these are examples, not an exhaustive list
b) In particular, the uncastrated adult male of domesticated cattle or oxen.
2. adjective /bʊl/
a) Large and strong, like a bull. <!not a separate word:
a bull elephant
b) Resembling a bull, like bull dog
3. verb /bʊl/
He bulled his way in.
b) To lie, to tell untruths.
Wikipedia foundation.