Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “fun”


noun [U]  /fʌn/ us  
pleasure, enjoyment, amusement, or someone or something that causes this: Everybody had a lot of fun at the party. It’s no fun having to work on Saturdays. He studies French just for fun/for the fun of it. I only said it in fun (= as a joke).


adjective [not gradable]  /fʌn/ infml us  
enjoyable: Going camping would be a really fun thing to do. Cindy is a fun person (= enjoyable to be with).
(Definition of fun from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of fun?
Browse related topics

You are looking at an entry to do with Experiencing difficulties, but you might be interested in these topics from the Easy and difficult topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “fun” in other dictionaries

Word of the Day


any imaginary frightening creature, especially one that is large and strange

Word of the Day

What’s that lovely smell?

by Kate Woodford,
October 29, 2014
As adult humans, we can distinguish about 10,000 different smells. It’s no wonder, then, that we have so many words and expressions to describe them. This week we’re taking a look at those smell words – words that describe good smells and words that describe bad smells. Most smell words are either

Read More 

high-frequency trading noun

October 27, 2014
a type of stock market trading that uses very complex technology to trade extremely quickly, often making tiny profits which nevertheless add up to substantial sums Lewis’s book, Flash Boys, is driving a huge amount of attention toward the topic of high frequency trading, and it has rekindled some of

Read More