An activity that is enjoyable in a way that can be easily identified as fun

It's a word, get over it.

A word that wasn't official until Shay Carl said so. An easier (and cooler) way of saying "more fun".

Its more fun than that.

Adj. non-standard comparative form of "more fun". Meaning that a given something (noun) provides more mirth or more entertainment than something else.

To say in a sentence that you want to describe you had more fun.

Something that is more fun than something else. Comes from The word fun, but it's for lazy people who don't want to say more fun.