bull

1 bull /ˈbʊl/ noun
plural bulls
1 bull
/ˈbʊl/
noun
plural bulls
Britannica Dictionary definition of BULL
[count]
1 
a  : an adult male animal of the ox and cow family
b  : an adult male of some other large animals (such as elephants or whales) — often used before another noun — compare calf, cow; see also pit bull
2 
finance : a person who tries to make money by buying stocks and selling them after their price has gone up : a person who expects the price of stocks to go up
— compare 1bear; see also bull market

a bull in a china shop

: a person who breaks things or who often makes mistakes or causes damage in situations that require careful thinking or behavior

a red rag to a bull

— see 1red

take the bull by the horns

: to deal with a difficult situation in a very direct or confident way
2 bull /ˈbʊl/ noun
2 bull
/ˈbʊl/
noun
Britannica Dictionary definition of BULL
[noncount] informal
: foolish or untrue words or ideas
— see also cock-and-bull story
3 bull /ˈbʊl/ noun
plural bulls
3 bull
/ˈbʊl/
noun
plural bulls
Britannica Dictionary definition of BULL
[count]
: an official command or statement written by the pope