Meaning of “fool” - Learner’s Dictionary

fool

noun uk us /fuːl/

B1 [ C ] a stupid person:

I was a fool to trust him.
make a fool (out) of sb

B2 to try to make someone look stupid intentionally:

She was always trying to make a fool out of me in front of my friends.
make a fool of yourself

B2 to behave in a silly or embarrassing way:

I got drunk and started singing and making a fool of myself.
act/play the fool

to behave in a silly way, usually in order to make people laugh:

Joe is always playing the fool in class.

(Definition of “fool noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)