Definition of FOUL

  1. (noun)an act that violates the rules of a sport
  2. (verb)hit a foul ball
  3. (verb)make impure
  4. (verb)become or cause to become obstructed
  5. (verb)commit a foul; break the rules
  6. (verb)spot, stain, or pollute
  7. (verb)make unclean
  8. (verb)become soiled and dirty
  9. (adj)(of a baseball) not hit between the foul lines
  10. (adj)highly offensive; arousing aversion or disgust
  11. (adj)offensively malodorous
  12. (adj)violating accepted standards or rules
  13. (adj)(of a manuscript) defaced with changes
  14. (adj)characterized by obscenity
  15. (adj)disgustingly dirty; filled or smeared with offensive matter
  16. (adj)especially of a ship's lines etc