Offensive to the senses; revolting:"a foul little creature with greedy eyes and slobbering mouth"(J.R.R. Tolkien). Having a bad odor or taste: foul breath; food that tasted foul. Rotten or putrid: foul meat.
Containing dirt, impurities, or other foreign matter; foul water. Clogged or bestrewn with unwanted material: The bay is foul with old sunken vessels. Overgrown or encrusted with weeds, barnacles, or other organisms. Used of a ship's bottom. Entangled or enwrapped: a foul anchor.
Morally detestable; wicked: foul deeds. Vulgar or obscene: foul language. Violating accepted standards or rules; dishonorable: used foul means to gain power.
Very disagreeable or displeasing; horrid: a foul movie. Inclement or unfavorable: in fair weather or foul. Irritable or upset: in a foul mood.
Sports Contrary to the rules of a game or sport: a foul boxing punch. Baseball Outside the foul lines: a foul fly ball.
Marked with editorial changes or corrections: foul copy.
Archaic Ugly; unattractive.
Abbr. Sports An infraction or a violation of the rules of play. Baseball A foul ball.
An entanglement or a collision.
An instance of clogging or obstructing.
A foul copy of a document.
To make dirty or foul; pollute. See Synonyms at contaminate.
To bring into dishonor; besmirch.
To clog or obstruct.
To entangle or catch (a rope, for example).
To encrust (a ship's hull) with foreign matter, such as barnacles.
Sports To commit a foul against. Baseball To hit (a ball) outside the foul lines.
To become foul.
Sports To commit a foul. Baseball To hit a ball outside the foul lines: fouled twice and then struck out; fouled out to the catcher.
To become entangled or twisted: The anchor line fouled on a rock.