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1. Highly offensive; arousing aversion or disgust
   - disgusting, disgustful [archaic], distasteful, loathly, loathsome, repellent, repellant, repelling, revolting, skanky, wicked, yucky, loathful [archaic], yukky
    
2. Offensively malodorous
   "a foul odour"
   - fetid, foetid [Brit], foul-smelling, funky, noisome, smelly, stinking, ill-scented
    
3. Violating accepted standards or rules
   "used foul means to gain power"
   - cheating, dirty, unsporting, unsportsmanlike
    
4. (of a baseball) not hit between the foul lines
    
5. (of a manuscript) defaced with changes
   "foul copy"
   - dirty, marked-up
    
6. Characterized by obscenity
   "foul language"
   - cruddy, filthy, nasty, smutty
    
7. Disgustingly dirty; filled or smeared with offensive matter
   "a foul pond"
   - filthy, nasty
    
8. Especially of a ship's lines etc
   "a foul anchor"
   - afoul, fouled

1. Hit a foul ball
    
2. Make impure
   - pollute, contaminate
    
3. Become or cause to become obstructed
   - clog, choke off, clog up, back up, congest, choke
    
4. Commit a foul; break the rules
    
5. Spot, stain, or pollute
   - befoul, defile, maculate
    
6. Make unclean
   "foul the water"
    
7. Become soiled and dirty

1. An act that violates the rules of a sport

Sounds like: fowl

Derived forms: foulest, fouling, fouler, fouls, fouled

See also: dirty, foully, foulness, illegible, ill-smelling, malodorous, malodourous, minging [Brit], offensive, out-of-bounds, pongy [Brit], soiled, stinky, tangled, unclean, unfair, unjust, unpleasant-smelling, whiffy [Brit]

Type of: attaint [archaic], begrime, bemire [archaic], block, change, close up, colly [archaic], dirty, disgrace, dishonor [US], dishonour [Brit, Cdn], grime, hit, impede, infringement, jam, obstruct, obturate, occlude, play, shame, soil, violation

Antonym: fair

Encyclopedia: Foul