Uncle

n.
  1. The brother of one's father or mother; also applied to an aunt's husband; -- the correlative of aunt in sex, and of nephew and niece in relationship.
  2. A pawnbroker.
  3. An eldery man; -- used chiefly as a kindly or familiar appellation, esp. (Southern U. S.) for a worthy old negro; as, “Uncle Remus.”
    4. My uncle ,
    a pawnbroker.
    Uncle Sam ,
    a humorous appellation given to the United States Government. See Uncle Sam, in Dictionary of Noted Names in Fiction.