Meaning of uncle

un•cle

1. a brother of one's father or mother.
2. an aunt's husband.
3. a familiar title or term of address for any elderly man.
4. a pawnbroker.
5. (cap.)Uncle Sam.
6. a word formerly used in communications to represent the letter U.
7. to concede defeat: They ganged up on him in the schoolyard and made him say uncle.