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Definition of foul:

  1. An entanglement; a collision, as in a boat race.
  2. 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.
  3. Hateful; detestable; shameful; odious; wretched.
  4. 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.
  5. In various games or sports, an act done contrary to the rules; a foul stroke, hit, play, or the like.
  6. Loathsome; disgusting; as, a foul disease.
  7. Not conformed to the established rules and customs of a game, conflict, test, etc.; unfair; dishonest; dishonorable; cheating; as, foul play.
  8. 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. Scurrilous; obscene or profane; abusive; as, foul words; foul language.
  10. See ball, under Foul, a.
  11. To become clogged with burnt powder in the process of firing, as a gun.
  12. To become entagled, as ropes; to come into collision with something; as, the two boats fouled.
  13. To cover ( a ship's bottom) with anything that impered its sailing; as, a bottom fouled with barnacles.
  14. To entangle, so as to impede motion; as, to foul a rope or cable in paying it out; to come into collision with; as, one boat fouled the other in a race.
  15. To incrust ( the bore of a gun) with burnt powder in the process of firing.
  16. To make filthy; to defile; to daub; to dirty; to soil; as, to foul the face or hands with mire.
  17. Ugly; homely; poor.


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