Definitions from Wiktionary ( )

▸ noun:  The brother or brother-in-law of one’s parent.
▸ noun:  The male cousin of one’s parent.
▸ noun:  (endearing) Used as a fictive kinship title for a close male friend of one's parent or parents.
▸ noun:  (euphemistic) Used as a title for the male companion to one's (usually unmarried) parent.
▸ noun:  (figuratively) A source of advice, encouragement, or help.
▸ noun:  (British, informal, dated) A pawnbroker.
▸ noun:  (especially in the Southern US, parts of UK and South Asia) An affectionate term for a man of an older generation than oneself, especially a friend of one's parents, by means of fictive kin.
▸ noun:  (Southern US, slang, archaic) An older African-American male.
▸ noun:  (Malaysia, Myanmar, Singapore, Brunei, informal) Any middle-aged or elderly man older than the speaker and/or listener.
▸ verb:  (transitive, colloquial) To address somebody by the term uncle.
▸ verb:  (intransitive, colloquial) To act like, or as, an uncle.
▸ noun:  (World War II era, joint US/RAF) radiotelephony clear-code word for the letter U.

---

▸ Word origin

▸ Words similar to uncle
▸ Usage examples for uncle

▸ Idioms related to uncle
▸ Wikipedia articles (New!)
▸ Popular adjectives describing uncle
▸ Words that often appear near uncle
▸ Rhymes of uncle

▸ Invented words related to uncle