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). 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!
[ obs. fun (v.) var. of fon befool: cf. FOND ]