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revolution

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noun revolution pronunciation in British English /ˌrevəˈluːʃ(ə)n/
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singularrevolution
pluralrevolutions
  1. 1
    [countable/uncountable] a situation in which people completely change their government or political system, usually by force

    the French/Russian Revolution

    a group committed to promoting revolution

  2. 2
    [countable] a sudden or major change, especially in ideas or methods

    a sexual/cultural revolution

    revolution in:

    A revolution in information technology is taking place.

  3. 3
    [countable/uncountable] the movement of something in a circle around something else, either once or continuously

    the revolution of the Earth around the Sun

    1. a.
      [countable] one complete turn made by something moving in a circle around a fixed point

      Engine speed is measured in revolutions per minute.

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