unofficial

un- +‎ official

• IPA^(key): /ʌn.əˈfɪʃ.əl/
• Rhymes: -ɪʃəl

unofficial (comparative more unofficial, superlative most unofficial)

1. Not officially established.

   the unofficial results of the ballot

   • 2019 May 5, Danette Chavez, “Campaigns are Waged On and Off the Game Of Thrones Battlefield (Newbies)”, in The A.V. Club‎, archived from the original on 28 January 2021:

     And even though their numbers have been halved—that’s the unofficial tally given in one of the strategy sessions—everyone from Sansa to Daenerys to Varys is wondering who is going to rule over which pile of smoking ruins.

   1. Implicitly true but withheld and/or contradicted by authority.

      The unofficial reason for invading the nation, however, was to control their resources.

2. Not acting with official authority.

   an unofficial adviser

   • 2022 August 24, Philip Haigh, “Network News: Union slams Avanti West Coast: 'lie' as services slashed”, in RAIL, number 964, page 6:

     Drivers' union ASLEF bluntly rebuffed the claim of unofficial action, calling it a lie. And Avanti West Coast was unable to provide any proof for its assertion, when questioned by RAIL.

3. (pharmacology) Not listed in a national pharmacopeia etc.

• inofficial (rare)

• official