fun is one of the 1000 most common headwords.
full - fun - function

Pronunciation

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Singular
fun

Plural
none

  1. (uncountable) If you have fun, you enjoy something.
    Thanks! I had a lot of fun today. Let's do it again.
  2. (uncountable) If you do something for fun, you do it because you enjoy it.
    It's not my job; I just write Wiktionary articles for fun.

Adjective

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Positive
fun

Comparative
more fun

Superlative
most fun

Positive
fun

Comparative
funner

Superlative
funnest

  1. A fun activity, time, person, etc. is enjoyable.
    I really like soccer. It's such a fun game.