backbench - definition and synonyms

noun [countable] British 

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/ˌbækˈbentʃ/
singularbackbench
pluralbackbenches
  1. one of the seats in the British Parliament where ordinary Members of Parliament sit. The leading members of each party sit on the front bench

    a backbench Member of Parliament

    She has decided to return to the backbenches (=to leave the Cabinet).