fun

American  

[fuhn] / fʌn /

noun

1. something that provides mirth or amusement.

   A picnic would be fun.

   Synonyms:

   gaiety, play, pleasure, merriment

2. enjoyment or playfulness.

   She's full of fun.

   Synonyms:

   gaiety, play, pleasure, merriment

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verb (used with or without object)

funned, funning

1. Informal. joke; kid.

adjective

funner, funnest

1. Informal. of or relating to fun, especially to social fun.

   a fun thing to do; really a fun person; the funnest game.

2. Informal. whimsical; flamboyant.

   The fashions this year are definitely on the fun side.

idioms

1. for / in fun, as a joke; not seriously; playfully.

   His insults were only in fun.

2. make fun of, to make the object of ridicule; deride.

   The youngsters made fun of their teacher.

3. like fun, certainly not; of doubtful truth.

   He told us that he finished the exam in an hour. Like fun he did!

fun British  

/ fʌn /

noun

1. a source of enjoyment, amusement, diversion, etc

2. pleasure, gaiety, or merriment

3. jest or sport (esp in the phrases in or for fun )

4. facetious amusement; frivolous activity

5. informal

   1. (adverb) quickly; vigorously

   2. (interjection) not at all! certainly not!

6. to ridicule or deride

7. (modifier) full of amusement, diversion, gaiety, etc

   a fun sport

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verb

1. informal (intr) to act in a joking or sporting manner

fun More Idioms  

More idioms and phrases containing fun

• for fun
• funny
• like fun
• make fun of
• more fun than a barrel of monkeys

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Etymology

Origin of fun

First recorded in 1675–85; dialectal variant of obsolete fon “to befool”; fond ¹ ( def. )

Example Sentences

Dr. Priestley said: "This was a really fun project to work on in my PhD, and I hope this research brings more attention to the importance of sugars in the immune system."

From Science Daily

“My shih tzu was a bright light and just fun and funny and had a great personality and everyone loved and adored him,” McVay said.

From Los Angeles Times

Try to make it fun, and don’t forget to foot the bill for members to attend.

From The Wall Street Journal

"Students have an image and we have a reputation that's associated with going out and having a bit of fun," she said.

From BBC

Banana Ball officially became a league in 2025, with the Party Animals, Firefighters and Texas Tailgaters joining the fun.

From Los Angeles Times

Related Words

• celebration
• distraction
• enjoyment
• joke
• joy
• laughter
• pastime
• pleasure
• sport