noun
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(countable, politics) A political upheaval in a government or state characterized by great change.
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(countable, politics) The popular removal and replacement of a government, especially by sudden violent action.
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Rotation: the turning of an object around an axis, one complete turn of an object during rotation.
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(astronomy) In the case of celestial bodies, the traversal of one body along an orbit around another body.
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A sudden, vast change in a situation, a discipline, or the way of thinking and behaving.
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A round of periodic changes, such as between the seasons of the year.
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Consideration of an idea; the act of revolving something in the mind.