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motion

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noun motion pronunciation in American English /ˈmoʊʃ(ə)n/ 
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singularmotion
pluralmotions
  1. 1
    [uncountable] the process or action of moving

    He studied the motion of the planets.

    Special instruments record the speed and motion of the atoms.

    in motion:

    Muybridge developed high-speed photography of people and animals in motion.

    1. a.
      [countable] a movement that someone or something makes

      Rub the horse's coat in a circular motion.

      She made a little fluttering motion with her hands.

  2. 2
    [countable] a formal proposal that people discuss and then vote on in a meeting or debate. Someone proposes a motion (=suggests it), and someone else must second it (=say formally that they support it) before it is accepted for discussion

    The Committee will debate the motion today.

    1. a.
      American a formal suggestion made by a lawyer to a judge in a court of law. A lawyer can file a motion (=suggest it), but the judge may deny it (=refuse to accept it)

      His lawyer filed a motion for dismissal.

      It was within the Judge's discretion to deny the counsel's motion.

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