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.

(transitive) To make dirty. / (transitive) To besmirch. / (transitive) To clog or obstruct. / (transitive, nautical) To entangle.

(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.

Obsolete form of foul.

simple past tense and past participle of foul

plural of foulness

The state of being foul.

plural of fouling

An island off the east coast of Essex where the Thames estuary joins the North Sea.

present participle of foul