DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   twang
       n 1: a sharp vibrating sound (as of a plucked string)
       2: exaggerated nasality in speech (as in some regional dialects)
          [syn: twang, nasal twang]
       v 1: cause to sound with a twang; "He twanged the guitar string"
       2: sound with a twang; "the bowstring was twanging"
       3: twitch or throb with pain
       4: pluck (strings of an instrument); "He twanged his bow"
       5: pronounce with a nasal twang