n. 1. (Zool.) Any animal that sucks blood; esp., the leech (Hirudo medicinalis), and related species. [ 1913 Webster ]
2. One who sheds blood; a cruel, bloodthirsty man; one guilty of bloodshed; a murderer. [ Obs. ] Shak. [ 1913 Webster ]
3. A hard and exacting master, landlord, or money lender; an extortioner. [ 1913 Webster ]