un ‧ cle S2 W3 /ˈʌŋk ə l/ BrE AmE noun [countable]
[ Date: 1200-1300 ; Language: Old French ; Origin: Latin avunculus 'mother's brother' ]
1 . the brother of your mother or father, or the husband of your aunt ⇨ aunt :
I went to stay with my uncle and aunt for a few days.
Uncle Philip
I was very excited about becoming an uncle (=your sister or your brother’s wife has a child) .
2 . used by children, in front of a first name, to address or refer to a man who is a close friend of their parents
3 . say uncle American English spoken used by children to tell someone to admit they have been defeated