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Definition of foul

foul

/faʊl/
foul

Adverb:foully
•
Plural:fouls
•
Past Simple:fouled
•
Past Participle:fouled
•
Present Participle:fouling
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foul Lexical Profile

foul Game Scores & Validity

• adjective

1

Offensive to the senses, especially through having a disgusting smell or taste or being visibly filthy.

Example

"A foul odor drifted up from the clogged kitchen drain."


2

In sports, outside the designated playing area or contrary to the established rules of the game.

Example

"The batter hit a sharp foul ball into the third-base stands."


3

Wicked, immoral, or dishonorable in nature; violating accepted standards of decency or fairness.

Example

"The detective immediately suspected that the missing businessman had met with foul play."


4

Wet, stormy, and rough (especially of weather), or extremely disagreeable and bad-tempered (of a mood).

Example

"The ferry crossing was delayed by foul weather and choppy seas."

Synonyms
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Antonyms
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• noun

1

An unfair or invalid stroke, piece of play, or physical contact that violates the rules of a sport or game.

Example

"The referee blew his whistle and called a personal foul on the defending guard."


2

In baseball, a batted ball that settles outside the baselines between home plate and first or third base, or passes outside the foul poles.

Example

"She fouled off three pitches in a row before hitting a single up the middle."

Synonyms
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• verb

1

To commit an infraction of the rules against an opposing player in a sport or game.

Example

"The defender fouled the striker just outside the penalty box."


2

To hit a pitched ball outside the fair territory baselines in baseball or softball.

Example

"The batter fouled the pitch back into the protective netting behind home plate."


3

To make something dirty, polluted, or disgustingly filthy, especially with waste or noxious matter.

Example

"Industrial runoff had fouled the river for decades before environmental regulations were enacted."


4

To entangle, jam, or clog a rope, anchor, cable, or piece of machinery so that it cannot operate freely.

Example

"Thick mats of kelp fouled the boat's propeller near the harbor entrance."

Synonyms
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Antonyms
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• adverb

1

In an unfair, dishonest, or rule-breaking manner, or into an entangled or erroneous state.

Example

"Any competitor who plays foul during the tournament will be immediately disqualified."

Synonyms
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Antonyms
View all antonyms for foul

Word Nuance & Usage

Do not confuse 'foul' (meaning offensive, dirty, or against the rules) with its homophone 'fowl' (a domesticated bird such as a chicken or duck).

• Rhymes for foul

Word Origin & Etymology

From Old English 'fūl' meaning rotten, unclean, or vile, derived from the Proto-Germanic root '*fulaz', which is ultimately related to the Latin 'pus' and 'putridus' (rotten).

Cite this Entry


Wordmom. (2026). Definition of Foul. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/foul
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