WordWeb Online

1. Very bad
   "a rotten play";
   - icky [informal], lousy [informal], stinking, stinky [informal], dire [Brit, informal], rubbish [Brit, informal], crummy [informal]
    
2. Damaged by decay; hence unsound and useless
   "rotten floor boards";
   - decayed, rotted
    
3. Having decayed or disintegrated; usually implies foulness
   "dead and rotten in his grave"

1. Used as an intensifier
   - very, really, real [N. Amer], rattling [informal], mucho [informal], thoroughly, cracking [Brit, informal], massively [informal], dirty [Brit, informal], excellently, magnificently, splendidly, famously, tremendously [informal], capitally, awesomely [informal]

Derived forms: rottener, rottenest

See also: bad, stale, unsound

Encyclopedia: Rotten,com