unofficial

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Adjective unofficial has 2 senses

unofficial - not having official authority or sanction; "a sort of unofficial mayor"; "an unofficial estimate"; "he participated in an unofficial capacity"
Antonyms: official, authoritative, authorized, authorised, ex officio, formal, formalized, formalised, semiofficial
unofficial - not officially established; "the early election returns are unofficial"
Antonym: confirmed (indirect, via unconfirmed)

unobtrucively unobtrusive unobtrusively unobtrusiveness unobtusive unobvious unoccupied unoffending unofficial unofficially unoiled unopen unopened unopposable unopposed unoptimized unordered

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