Definition of unofficial in English:

unofficial

Syllabification: un·of·fi·cial
Pronunciation: /ˌənəˈfiSH(ə)l
 
/

adjective

Not officially authorized or confirmed: unofficial reports that dozens of people were injured
More example sentences
  • So count us in for next year's challenge and let's see if we can make our, slightly unofficial, record official.
  • I'm sure she's flouting loads of official and unofficial tube etiquette in one fell swoop here.
  • Yet there is the possibility of an engagement, whether official or unofficial for John Brown.
Synonyms
unconfirmed, unauthenticated, uncorroborated, unsubstantiated, provisional, off the record
informal, casual;
unauthorized, unsanctioned, unaccredited

Derivatives

unofficially

adverb
More example sentences
  • When we visited, the centre was looking after two baby barn owls, unofficially called Itchy and Stratchy after the cartoon cat and mouse from The Simpsons.
  • The southern end was unofficially opened in October 1912.
  • Estonia and Lithuania have already tied their currencies unofficially to the euro and I would not be surprised to see Denmark or Sweden go over to the other side.

Definition of unofficial in: