foul
Pluralfouls
Pluralfouls
- 1Something a player does that is against the rules of a game, like tripping or pushing another player.
The referee called a foul when she pushed the other player.
He had five fouls, so he had to leave the game.
UsageA player commits a foul, and the referee calls it.
Similarinfringement, infraction, violation
Note
- 2So nasty that it makes you feel sick or disgusted.
A foul smell came out of the trash can.
The milk had gone bad and tasted foul.
UsageOften used for smells and tastes: a foul smell. Do not mix it up with fowl (birds).
Similarrank
- 3To break a rule of the game, often by pushing, hitting or tripping a player from the other team.
Don't foul the shooter, or he will get free throws.
He fouled the other team's best player and got a yellow card.
UsageYou often hear that a player was fouled, meaning someone fouled him.
- 4
- 5Not honest, or against the rules of a game or a test.
The referee warned both teams against foul play before the match began.
The boxer lost points for a foul punch below the belt.
UsageMost often in foul play, and in by fair means or foul (in any way at all).
Similarunfair, dirty, illegal, dishonest
Oppositefair
Note
- 6Very bad or unpleasant, so that people hate it. A foul mood is an angry, grumpy one.
Bullying a younger child is a foul thing to do.
The villain in the story is the foulest man in the kingdom.
UsagePeople are often in a foul mood. Calling a person foul is very strong.
Similarvile, wicked, evil, despicable, loathsome
Oppositepleasant
Note
- 7In baseball, outside the two long lines that run out from home plate.
The umpire said the ball was foul.
A girl in the stands caught a foul ball with her glove.
UsageYou can say the ball went foul.
Oppositefair
Note
- 8
- 9In baseball, a ball that is hit outside the base lines.
He hit a foul into the stands, and a girl caught it.
The batter hit three fouls in a row before he got a single.
Note
- 10To make something dirty, for example with mud or waste.
Oil from the damaged ship fouled the sand along the beach.
Please do not let your dog foul the grass in the park.
UsageOften a polite way to talk about dog mess. The dirt comes after with: fouled with oil.
Note
- 11
- 12In baseball, to hit the ball outside the two long lines that run out from home plate.
He fouled the first pitch into the seats.
It is easy to foul the ball when you try to bunt.
UsageOften with off: foul off a pitch.
- 13
- 14To get a rope, chain or boat part caught and tangled, or to become tangled.
A loose rope fouled the boat's propeller, and the engine stopped.
Strong winds can foul the ropes on a sailboat.
UsageUsually the weed or rope comes first: weed fouls the propeller. Or say fouled in weed.
Similartangle, entangle, snarl, catch
Oppositeuntangle, disentangle
Less common meanings
- 15In bowling, touching the lane, usually by mistake, during or after a throw.
Her foot slid past the line, and the screen showed a foul.
She got a foul when her foot crossed the line in bowling.
Note
- 16
- 17
- 18
- 19Not good to look at, or of poor quality.
Let us, like merchants, show our foulest wares.
c. 1602, William Shakespeare, “The Tragedie of Troylus and Cressida”Note
- 20On or so close to a place, like a train track, that it is in the way.
The car stopped foul of the tracks, and the train had to brake hard.
Workers must never stand foul of the tracks when a train is coming.
UsageThe opposite is clear of the tracks.
Oppositeclear
Note
Showing meanings only.
Practice
Can you tell the meanings of foul apart? Answer 3 quick questions from this page, or write your own sentence and AI will check it.
Origins
From the Old English word fūl, meaning “dirty” or “rotten”, which goes back to a very old root meaning “to rot”.
Checked 3 Nov 2026 · 3 facts
- Foul derives from Old English fūl. en.wiktionary.org
- Old English fūl meant dirty or rotten. en.wiktionary.org
- The word ultimately derives from a root meaning to rot. en.wiktionary.org
From the Old English word fūlian, meaning “to rot” or “to become foul”.