DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   heaving
       n 1: an upward movement (especially a rhythmical rising and
            falling); "the heaving of waves on a rough sea" [syn:
            heave, heaving]
       2: breathing heavily (as after exertion) [syn: panting,
          heaving]
       3: the act of lifting something with great effort [syn: heave,
          heaving]
       4: throwing something heavy (with great effort); "he gave it a
          mighty heave"; "he was not good at heaving passes" [syn:
          heave, heaving]