Definition of uncle
1a : the brother of one's father or motherb : the husband of one's aunt or uncle
2 : one who helps, advises, or encourages
3 —used as a cry of surrender was forced to cry uncle
4 capitalized : uncle sam
Examples of uncle in a Sentence
I have three uncles and two aunts.
My Uncle David is visiting next week.
Origin and Etymology of uncle
Middle English, from Anglo-French, from Latin avunculus mother's brother; akin to Old English ēam uncle, Welsh ewythr, Latin avus grandfather
First Known Use: 14th century
UNCLE Defined for English Language Learners
Definition of uncle for English Language Learners
: the brother of your father or mother or the husband of your aunt
—used as a word that you say when you are being hurt in a fight to show that you admit being defeated and do not want to continue fighting
UNCLE Defined for Kids
Definition of uncle for Students
1 : the brother of a person's father or mother
2 : the husband of a person's aunt
Seen and Heard
What made you want to look up uncle? Please tell us where you read or heard it (including the quote, if possible).