a. The brother of one's mother or father.
b. The husband of a sibling of one's mother or father.
2. Used as a form of address for an older man, especially by children.
3. A kindly counselor.
4. Slang A pawnbroker.
5. Uncle Uncle Sam.
cry/say uncle Informal
To indicate a willingness to give up a fight or surrender: tickled my brother until he cried uncle.
[Middle English, from Anglo-Norman, from Latin avunculus, maternal uncle; see awo- in the Appendix of Indo-European roots.]
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