Foul

1. superl. Having freedom of motion interfered with by collision or entanglement; entangled; — opposed to clear; as, a rope or cable may get foul while paying it out.
2. n. A bird.
3. superl. Covered with, or containing, extraneous matter which is injurious, noxious, offensive, or obstructive; filthy; dirty; not clean; polluted; nasty; defiled; as, a foul cloth; foul hands; a foul chimney; foul air; a ship’s bottom is foul when overgrown with barnacles; a gun becomes foul from repeated firing; a well is foul with polluted water.
4. superl. Scurrilous; obscene or profane; abusive; as, foul words; foul language.
5. superl. Hateful; detestable; shameful; odious; wretched.
6. superl. Loathsome; disgusting; as, a foul disease.
7. superl. Ugly; homely; poor.
8. superl. Not favorable; unpropitious; not fair or advantageous; as, a foul wind; a foul road; cloudy or rainy; stormy; not fair; — said of the weather, sky, etc.
9. superl. Not conformed to the established rules and customs of a game, conflict, test, etc.; unfair; dishonest; dishonorable; cheating; as, foul play.
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The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.