adjective
fouler; -est
[or more ~; most ~]
very unpleasant to taste or smell
morally bad :very evil
very bad or unpleasant
indecent and offensive
very unfair :not morally or socially acceptable
baseball :outside the area between the foul lines
A foul ball is a batted ball that lands in the area outside the foul lines. - compare 1fair
fall foul of
to get into trouble because of (the law, a rule, etc.)
noun
plural fouls
[count] sports :an action that is against the rules and for which a player is given a penalty
baseball :a batted ball that lands outside the foul lines :a foul ball
cry foul
verb
fouls; fouled; fouling
[+ obj] :to make (a substance, place, etc.) dirty
sports
[no obj] :to commit a foul
[+ obj] :to commit a foul against (another player)
[+ obj] baseball :to hit (a pitched ball) so that it lands outside the foul lines
[+ obj] :to become twisted around (something) so that it cannot move, be used, etc.
foul out
[phrasal verb]
basketball :to be forced to leave a game because you have made too many fouls
baseball of a batter :to make an out by hitting a foul fly ball ball that is caught by a fielder
foul up
[phrasal verb] informal
foul (something) up :to ruin or spoil (something)
foul up :to make mistakes :to fail at something because you have made a mistake or been careless