Definition of foul
(adj)
highly offensive; arousing
aversion or disgust; "a disgusting smell"; "distasteful language"; "a loathsome disease"; "the
idea of
eating meat is
repellent to me"; "revolting food"; "a wicked stench"
violating
accepted standards or rules; "a
dirty fighter"; "used
foul means to
gain power"; "a
nasty unsporting serve"; "fined for unsportsmanlike behavior"
(of a manuscript) defaced with changes; "foul (or dirty) copy"
characterized by obscenity; "had a filthy mouth"; "foul language"; "smutty jokes"
especially of a ship's lines etc; "with its sails afoul"; "a
foul anchor"
(noun)
an act that violates the rules of a
sport
make unclean; "foul the water"