American Dictionary

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Definition fun in American English

fun noun

[uncountable] noun
/fʌn/
1

enjoyment, especially from an activity that is not important or serious

Example

We haven't had such fun for years.

Example

We had great fun comparing our baby pictures.

Example

The kids had a lot of fun with that old tent.

Example

It was just a little harmless fun.

Synonyms and related words
Example

Spending money sure is fun!

Example

That was fun, wasn't it?

Example

Science can be fun.

Example

Do come, it'll be good fun.

Synonyms and related words
1.2

someone who you enjoy spending time with, especially because you enjoy the same activities

Example

You'll love Jamal, he's great fun.

Synonyms and related words
Definition fun in American English