an act that violates the rules of a sport

hit a foul ball

make impure

become or cause to become obstructed

commit a foul; break the rules

spot, stain, or pollute

make unclean

become soiled and dirty

highly offensive; arousing aversion or disgust

offensively malodorous

violating accepted standards or rules

(of a baseball) not hit between the foul lines

(of a manuscript) defaced with changes

characterized by obscenity

disgustingly dirty; filled or smeared with offensive matter

especially of a ship's lines etc

(baseball) a ball struck with the bat so that it does not stay between the lines (the foul lines) that define the width of the playing field

a line from which basketball players take penalty shots

a line across a bowling alley that a bowler must not cross

lines through 1st and 3rd base indicating the boundaries of a baseball field

baseball: hit a ball such that it is caught from an out in foul territory

unfair or dishonest behavior (especially involving violence)

an unhindered basketball shot from the foul line; given to penalize the other team for committing a foul

make a mess of, destroy or ruin

using foul or obscene language

offensively malodorous

using foul or obscene language

an embarrassing mistake

protective garment that is intended to keep the wearer dry and warm in bad weather

a light plain-weave or twill-weave silk or silklike fabric (usually with a printed design)

made dirty or foul

especially of a ship's lines etc

in an unfair and insulting manner

in a wicked and shameful manner

dark brown mustelid of woodlands of Eurasia that gives off an unpleasant odor when threatened

disgusting wickedness and immorality

a state characterized by foul or disgusting dirt and refuse

(of weather) the badness of the weather

the attribute of having a strong offensive smell