adjective, -er, -est, adverb, noun, verb | 1. | grossly offensive to the senses; disgustingly loathsome; noisome: a foul smell. |
| 2. | containing or characterized by offensive or noisome matter: foul air; foul stagnant water. |
| 3. | filthy or dirty, as places, receptacles, clothes, etc. |
| 4. | muddy, as a road. |
| 5. | clogged or obstructed with foreign matter: a foul gas jet. |
| 6. | unfavorable or stormy: foul weather. |
| 7. | contrary, violent, or unfavorable, as the wind. |
| 8. | grossly offensive in a moral sense. |
| 9. | abominable, wicked, or vile, as deeds, crime, slander, etc. |
| 10. | scurrilous, profane, or obscene; offensive: foul language. |
| 11. | contrary to the rules or established usages, as of a sport or game; unfair: a foul blow. |
| 12. | Baseball. pertaining to a foul ball or a foul line. |
| 13. | limited in freedom of movement by obstruction, entanglement, etc.: a foul anchor. |
| 14. | abounding in errors or in marks of correction, as a printer's proof, manuscript, or the like. |
| 15. | Nautical.
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| 16. | North England and Scot.. not fair; ugly or unattractive. |
| 17. | Obsolete. disfigured. |
| 18. | in a foul manner; vilely; unfairly. |
| 19. | Baseball. into foul territory; so as to be foul: It looked like a homer when he hit it, but it went foul. |
| 20. | something that is foul. |
| 21. | a collision or entanglement: a foul between two racing sculls. |
| 22. | a violation of the rules of a sport or game: The referee called it a foul. |
| 23. | Baseball. foul ball. |
| 24. | to make foul; defile; soil. |
| 25. | to clog or obstruct, as a chimney or the bore of a gun. |
| 26. | to collide with. |
| 27. | to cause to become entangled or caught, as a rope. |
| 28. | to defile; dishonor; disgrace: His reputation had been fouled by unfounded accusations. |
| 29. | Nautical. (of barnacles, seaweed, etc.) to cling to (a hull) so as to encumber. |
| 30. | Baseball. to hit (a pitched ball) foul (often fol. by off or away): He fouled off two curves before being struck out on a fastball. |
| 31. | to become foul. |
| 32. | Nautical. to come into collision, as two boats. |
| 33. | to become entangled or clogged: The rope fouled. |
| 34. | Sports. to make a foul play; give a foul blow. |
| 35. | Baseball. to hit a foul ball. |
| 36. | foul out,
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| 37. | foul up, Informal. to cause confusion or disorder; bungle; spoil. |
| 38. | fall foul or afoul of,
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| 39. | foul one's nest. to dishonor one's own home, family, or the like. |
| 40. | run foul or afoul of, to come into collision or controversy with: to run foul of the press. |

fouled up
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