DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   sigh
       n 1: an utterance made by exhaling audibly [syn: sigh,
            suspiration]
       2: a sound like a person sighing; "she heard the sigh of the
          wind in the trees"
       v 1: heave or utter a sigh; breathe deeply and heavily; "She
            sighed sadly" [syn: sigh, suspire]
       2: utter with a sigh