foul

IPA: fˈaʊɫ

(sports) A breach of the rules of a game, especially one involving inappropriate contact with an opposing player in order to gain an advantage; for example, tripping someone up in soccer, or contact of any kind in basketball.
(bowling) A (usually accidental) contact between a bowler and the lane before the bowler has released the ball.
(baseball) A foul ball, a ball which has been hit outside of the base lines.

(transitive) To make dirty.
(transitive) To besmirch.
(transitive) To clog or obstruct.
(transitive, nautical) To entangle.
(transitive, basketball) To make contact with an opposing player in order to gain advantage.
(intransitive, basketball) To commit a foul.
(transitive, baseball) To hit outside of the baselines.
(intransitive, baseball) To hit a ball outside of the baselines.
(intransitive) To become clogged.
(intransitive) To become entangled.
To come into contact or collide with.

Covered with, or containing unclean matter; dirty.
(of words or a way of speaking) Obscene, vulgar or abusive.
Detestable, unpleasant, loathsome.
Disgusting, repulsive; causing disgust.
(obsolete) Ugly; homely; poor.
Unpleasant, stormy or rainy. (of the weather)
Dishonest or not conforming to the established rules and customs of a game, conflict, test, etc.
(nautical) Entangled and therefore restricting free movement, not clear.
(technical) (with "of") Positioned on, in, or near enough to (a specified area) so as to obstruct it.
(baseball) Outside of the base lines; in foul territory.

Examples of "foul" in Sentences

The man used the foul language.
Do you know the world is a foul sty
The third foul disqualifies the player.
Stow the complaints and cut the foul language.
The foul ended the bout giving Farley the win.
The priest of the temple was arrested for foul play.
The use of foul language in the article is gratuitous.
None of the sources in the article fall foul of any of that.
Everyone in the van is thoroughly doused in the foul contents.
During the summer months the river smelled foul and was mostly dry and stagnant.