Source : Webster's Revised Unabridged Dictionary (1913)

Cleaver \Cleav"er\, n.
   One who cleaves, or that which cleaves; especially, a
   butcher's instrument for cutting animal bodies into joints or
   pieces.

Source : WordNet®

cleaver
     n : a butcher's knife having a large square blade [syn: {meat
         cleaver}, {chopper}]