- 1 [transitive] foul somebody (in sports) to do something to another player that is against the rules of the game He was fouled as he tried to make a shot.
- 2[intransitive, transitive] foul (something) (in baseball) to hit the ball outside the playing area
- 3 [transitive] foul something to make something dirty, usually with waste material Do not permit your dog to foul the grass. More and more beaches are being fouled by oil spills.
- 4 [transitive, intransitive] to become caught or twisted in something and stop it from working or moving foul something (up) The rope fouled the propeller. The line became fouled in (= became twisted in) the propeller. foul (up) A rope fouled up (= became twisted) as we pulled the sail down. Phrasal Verbsfoul outfoul upfoul somethingup
NAmE//faʊl//Verb Forms present simple I / you / we / they foul
he / she / it fouls
past simple fouled
-ing form fouling