WordWeb Online

1. Extremely annoying or displeasing
   "the ceaseless tumult of the jukebox was maddening";
   - exasperating, infuriating, vexing

1. Cause to go crazy; cause to lose one's mind
   - craze
    
2. Cause to become very annoyed; get on someone's nerves
   - drive up the wall
    
3. Make mad
   "His behaviour is maddening"

See also: displeasing

Type of: anger, bedevil, crucify, dun, frustrate, rag, torment

Encyclopedia: Madden, Owen