uncle
Americannoun
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a brother of one's father or mother.
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an aunt's husband.
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a familiar title or term of address for any elderly man.
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Slang. a pawnbroker.
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(initial capital letter) Uncle Sam.
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a word formerly used in communications to represent the letter U.
idioms
noun
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a brother of one's father or mother
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the husband of one's aunt
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a term of address sometimes used by children for a male friend of their parents
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slang a pawnbroker
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of uncle
First recorded in 1250–1300; Middle English, from Anglo-French uncle, Old French oncle, from Latin avunculus “mother's brother,” equivalent to av(us) “mother's father” + -unculus suffix extracted from diminutives of n-stems ( see homunculus)
Explanation
Your uncle is your parent's brother, or the man who marries one of your parent's siblings. Your favorite uncle might teach you to play chess or take you to amusement parks. Usually, an uncle is a relative — the brother of your mother, for example, or your dad's step-brother. It's also common in many cultures to have honorary uncles who are close family friends. From your uncle's perspective, you are either his niece or nephew. Colloquially, when you say or cry uncle, you're admitting defeat: "I'll let go of your arm when you say uncle!"
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"We want to create a space which is Uncle Bryn themed for the real fans to actually come, with little bits, little Easter eggs, for people to discover when they get there."
From BBC • Jun. 22, 2026
You are doing a square dance with your children and the two-step with Uncle Sam.
From MarketWatch • Jun. 19, 2026
His Uncle Frank telling jokes from behind the bar in one of these taverns first piqued Dreesen’s interest in comedy.
From Los Angeles Times • Jun. 18, 2026
Shah admits that Uncle Sam could contribute to volatility, as markets try to handicap these potential worries.
From Barron's • Jun. 9, 2026
Inside the house, Auntie and Uncle talked in hushed voices and stopped suddenly when any of the children came in the room.
From "Code Name Kingfisher" by Liz Kessler
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.