Wordnet 3.0
NOUN (2)
1. 
 a bar used as a lever (as in twisting rope); 
2. 
 a workman who heaves freight or bulk goods (especially at a dockyard); 
The Collaborative International Dictionary of English v.0.48:
Heaver \Heav"er\ (h[=e]v"[~e]r), n.
   1. One who, or that which, heaves or lifts; a laborer
      employed on docks in handling freight; as, a coal heaver.
      [1913 Webster]
   2. (Naut.) A bar used as a lever. --Totten.
      [1913 Webster]
WordNet (r) 3.0 (2006):
heaver
    n 1: a bar used as a lever (as in twisting rope)
    2: a workman who heaves freight or bulk goods (especially at a
       dockyard)