n. & adj.
--n.
1. amusement, esp. lively or playful.
2 a source of this.
3 (in full fun and games) exciting or amusing goings-on.
--adj. disp. colloq. amusing, entertaining, enjoyable (a fun thing to do).
Phrases and idioms:
for fun (or for the fun of it) not for a serious purpose. fun run colloq. an uncompetitive run, esp. for sponsored runners in support of a charity. have fun enjoy oneself. in fun as a joke, not seriously. is great (or good) fun is very amusing. like fun
1. vigorously, quickly.
2 much.
3 iron. not at all. what fun! how amusing!
Etymology: obs. fun (v.) var. of fon befool: cf. FOND