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adjective official pronunciation in American English /əˈfɪʃ(ə)l/
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  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 principal.
    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.
    3. c.
      used about information that has been announced publicly
      It’s official – the princess is to marry next year.
  2. 2
    relating to your job, especially a job in which you have authority or represent other people
    The White House is the President’s official residence.
    a list of my official duties

nanodegree

a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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hypocaust

an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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