Uncle

II. Uncle ·noun 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.

III. Uncle ·add. ·noun An eldery man;

— used chiefly as a kindly or familiar appellation, ·esp. (Southern U. S.) for a worthy old negro; as, "Uncle Remus.".

uncle
Mine uncle's; a necessary house. He is gone to visit his uncle; saying of one who leaves his wife so...

Dictionary of The Vulgar Tongue by Francis Grose
uncle
See aunt. ...

A glossary of provincial and local words used in England by Francis Grose
uncle sam
The cant or vulgar name of the United States Government; sometimes called Brother Jonathan. It is us...

Dictionary of American Words And Phrases by John Russell Bartlett.
grinagog, the cat's uncle
A foolish grinning fellow, one who grins without reason. ...

Dictionary of The Vulgar Tongue by Francis Grose