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sphere

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noun [countable] sphere pronunciation in American English /sfɪr/ 
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singularsphere
pluralspheres
  1. 2
    a particular area of interest, activity, work, etc. that is one of many parts of life
    the financial/political/scientific etc. sphere:

    Let's take this debate out of the political sphere and into the public arena.

    Women were beginning to take responsibility for things outside the domestic sphere.

  2. 3
    a group in society
    cultural/social sphere:

    They moved in different cultural spheres.

  3. 4
    an area of responsibility or a type of situation over which a person or group has influence or power

    They knew not to interfere in matters outside their sphere of operation.

    sphere of influence:

    The economic boom has greatly expanded the U.S.'s sphere of influence.

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selfie stick

an expandable stick which you attach to a mobile phone or camera to help you take a selfie …

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