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official

adjective
 
 
/əˈfɪʃ.əl/

Definition

C2 relating to a position of responsibility: He visited China in his official capacity as America's trade representative. Number Ten Downing Street is the British prime minister's official residence. → Opposite unofficialPosition and status in groups and organizations B2 agreed to or arranged by people in positions of authority: The official photos of the prime minister's tour of India are in the magazine. The queen will attend the official opening of the theatre in June. There is to be an official inquiry into the incident.Position and status in groups and organizations C2 If a piece of information is official, it has been announced publicly with authority: Their engagement is now official. Inflation has fallen below two percent, and that's official.Announcing, informing and stating
(Definition of official adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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