Todays word: fun

fun (PLEASURE)
noun [U]
pleasure, enjoyment, amusement:
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.
See usage note at funny (AMUSING).