Offensive to the senses, especially through having a disgusting smell or taste or being dirty. adjective
The foul odor coming from the garbage was unbearable.
The room was filled with foul air after the fire.
Wicked or immoral; characterized by dishonesty or deceit. adjective
He was known for his foul deeds and treacherous behavior.
The politician's foul play was exposed in the media.
In sports, an action that is against the rules. noun
The referee called a foul on the player for tripping his opponent.
She was penalized for a foul during the basketball game.
To make something dirty or polluted. verb
The oil spill fouled the pristine waters of the bay.
The factory was fined for fouling the river with waste.
To commit a foul in sports. verb
He fouled the striker just outside the penalty area.
The player was ejected from the game for fouling too many times.