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senior

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adjective British English pronunciation: senior /ˈsiːniə(r)/
  1. 1
    with a high rank or position

    a senior officer/teacher/manager

    1. a.
      with a rank or position that is higher than someone else's
      senior to:

      There are only two posts that are senior to mine.

  2. 2
    [only before noun] older

    Only senior students can leave the premises at lunchtime.

    1. b.

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