UNCLE

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.

A pawnbroker. [Slang] Thackeray. My uncle, a pawnbroker. [Slang] - - Uncle Sam, a humorous appellation given to the United States Government. See Uncle Sam, in Dictionary of Noted Names in Fiction.