'UNCLE' definitions:

Definition of 'uncle'

From: WordNet
noun
The brother of your father or mother; the husband of your aunt [ant: aunt, auntie, aunty]
noun
A source of help and advice and encouragement; "he played uncle to lonely students"

Synonyms of 'uncle'

From: Moby Thesaurus

Acronyms for 'UNCLE'

From: V.E.R.A.
  • Unix Net for Computer security in Law Enforcement (org., USA, Unix), "U.N.C.L.E."