fun

noun [U] (PLEASURE)

/fʌn/

Definition

A1 pleasure, enjoyment, or entertainment: Have fun (= enjoy yourself)! Having fun (= are you enjoying yourself)? I really enjoyed your party - it was such good fun. She's great fun to be with. Mark was ill for most of the holiday so that took all the fun out of it. It's no fun/not much fun (= not enjoyable) having to work on Saturdays. a fun-loving girl "We're going on a picnic at the weekend." "What fun (= how enjoyable)!" The relationship was never going to work, but it was fun while it lasted.General words for fun for fun (also for the fun of it) B1 for pleasure: I ran but just for fun.Pleasure and happiness make fun of sb/sth B2 to make a joke about someone or something in a way that is not kind: The other children were always making fun of him because he was fat and wore glasses.Mocking and taunting

(Definition of fun noun (PLEASURE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)