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

1. (sport) an act that violates the rules of a sport

1. (baseball) hit a foul ball
    
2. Make impure in a bad way; make something harmful, especially by the addition of some unwanted substance
   "The industrial wastes fouled the lake";
   - pollute, contaminate
    
3. Become or cause to become obstructed
   "The leaves foul our drains in the Fall";
   - clog, choke off, clog up, back up, congest, choke
    
4. Commit a foul; break the rules
    
5. Spoil, spot, stain, or pollute
   "The townspeople fouled the river by emptying raw sewage into it";
   - befoul, defile, maculate [literary]
    
6. Make unclean
   "foul the water"
    
7. Become soiled and dirty

Sounds like: forwards, forewofoul

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

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

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