Meaning of “fit” - Learner’s Dictionary

fit

noun uk us /fɪt/
a good/loose/tight, etc fit

used to say how something fits someone or somewhere:

These shoes are a perfect fit.
SHORT EXPERIENCE [ C ]

a sudden, uncontrolled period of doing something or feeling something:

a coughing fit
I hit him in a fit of anger.
ILLNESS [ C ]

a short period of illness when someone cannot control their movements and becomes unconscious:

to have an epileptic fit
have a fit informal

to become extremely angry:

Mum had a fit when she saw the mess we'd made.

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