This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Not official: the unofficial election results.

adj. Not acting officially: an unofficial adviser.

adj. Not officially established.

adj. Not acting with official authority.

adj. Not listed in a national pharmacopeia &c.

Not official; specifically, in medicine, not approved by an authoritative body.

adj. not having official authority or sanction

adj. not officially established

"The foreign ministers, he says, have agreed to what he called an unofficial ceasefire, to allow in unarmed Indonesian military and civilian observers to enforce the ceasefire, and to hold further bilateral talks with Indonesian participation in the near future."

summary    unsanctioned    drumhead    wild-cat    informal    unauthorised    loose    unauthorized    unconfirmed   

official   

informal   

artificial    beneficial    initial    judicial    official    prejudicial    sacrificial    superficial   

confidential    informal    previous    self-appointed    diplomatic    respective    soviet    legitimate    anonymous    authoritative