Longman Dictionary of Contemporary English - fun

~1 adj 1 only before noun a fun activity or experience is enjoyable  (It was a fun night out - we'll have to do it again sometime.) 2 someone who is fun is enjoyable to be with because they are cheerful and amusing  (a fun person/girl/guy etc especially AmE)  (She's a fun person to be around. | good/great fun BrE)  (The O'Brian boys were great fun.) ~2 n 1 an experience or activity that is very enjoyable and exciting  (It's no fun to be working inside when the weather's nice. | good/great fun BrE)  (Why don't you come with us? It'll be great fun. | have fun (=to have an enjoyable time))  (The children were having so much fun, I hated to call them inside. | What fun! (=that sounds very enjoyable!)) 2 for fun also for the fun of it if you do something for fun, you do it because you enjoy it and not for any other reason  (We drove all the way to the beach, just for fun.) 3 full of fun playful and liking amusement  (Jan's always so cheerful and full of fun.) 4 fun and games playful activities  (My job isn't all fun and games you know - I work hard as well.) 5 not be my idea of fun used to talk about an activity, situation etc that is exciting or interesting to other people but is not for you  (Digging up old bones in a hot desert is not my idea of fun.) 6 in fun if you make a joke or say something about someone in fun, you do not intend it to be insulting  (Don't get upset Chris, she only said it in fun.) 7 make fun of sb/sth to make a joke about someone that is insulting or makes them feel bad  (The kids at school always made fun of Jill's clothes.) 8 like fun AmE spoken used when you think something will not happen, or when something is not true  ("I'm going to Barbara's house." "Like fun you are! Come and finish your chores first.")  (- see also funny, figure of fun figure1 (14), poke fun at poke1 (5))