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adjective British English pronunciation: official /əˈfɪʃ(ə)l/
  1. 1
    done by people in authority

    There will be an official investigation into last week's accident.

    You'll have to get official permission from the headteacher.

    1. a.
      used about things that are decided by a government

      China's official representatives at the United Nations

      Spanish is the country's official language.

    2. b.
      used about information that someone in authority provides. This word is sometimes used for suggesting that the information is not completely reliable

      His name did not appear in the official report.

      The official version is that the whole thing was an accident.

  2. 2
    relating to your job, especially a job in which you have authority or represent other people

    a list of my official duties

    the official country residence of the Prime Minister

dark pool

a method of financial trading in which share prices are hidden and not openly available to the public

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