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English definition of “fun”

fun

noun [U]  /fʌn/ us  
pleasure, enjoyment, amusement, or someone or something that causes this: Everybody had a lot of fun at the party. It’s no fun having to work on Saturdays. He studies French just for fun/for the fun of it. I only said it in fun (= as a joke).

fun

adjective [not gradable]  /fʌn/ infml us  
enjoyable: Going camping would be a really fun thing to do. Cindy is a fun person (= enjoyable to be with).
(Definition of fun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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