Covered with, or containing unclean matter; dirty.
A ship's bottom is foul when overgrown with barnacles
(of words or a way of speaking) obscene, vulgar or abusive.
His foul language causes many people to believe he is uneducated.
Detestable, unpleasant, loathsome.
He has a foul set of friends.
Disgusting, repulsive; causing disgust.
There was a foul smell coming from the toilet.
Ugly; homely; poor.
(of the weather) Unpleasant, stormy or rainy.
Some foul weather is brewing.
Dishonest or not conforming to the established rules and customs of a game, conflict, test, etc.
Foul play is not suspected.
Entangled and therefore restricting free movement, not clear.
We've got a foul anchor.
Outside of the base lines; in foul territory.
Jones hit foul ball after foul ball.
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.
A (usually accidental) contact between a bowler and the lane before the bowler has released the ball.
A foul ball, a ball which has been hit outside of the base lines.
Jones hit a foul up over the screen.
To make dirty.
She's fouled her diaper.
To besmirch.
He's fouled his reputation.
To clog or obstruct.
The hair has fouled the drain.
To entangle.
The kelp has fouled the prop.
To make contact with an opposing player in order to gain advantage.
Smith fouled him hard.
To hit outside of the baselines.
Jones fouled the ball off the facing of the upper deck.
To become clogged.
The drain fouled.
To become entangled.
The prop fouled on the kelp.
To commit a foul.
Smith fouled within the first minute of the quarter.
To hit a ball outside of the baselines.
Jones fouled for strike one.