Source : Webster's Revised Unabridged Dictionary (1913)

Strangler \Stran"gler\, n.
   One who, or that which, strangles. ``The very strangler of
   their amity.'' --Shak.

Source : WordNet®

strangler
     n 1: an epiphytic vine or tree whose aerial roots extend down the
          trunk of a supporting tree and coalesce around it
          eventually strangling the tree [syn: {strangler tree}]
     2: someone who kills by strangling [syn: {garroter}, {garrotter},
         {throttler}, {choker}]