rotation
US /roʊˈteɪ.ʃən/
UK /roʊˈteɪ.ʃən/
1.
the action of rotating around an axis or center
:
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The Earth's rotation causes day and night.
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The machine's smooth rotation indicated it was well-maintained.
2.
a regular sequence of changes or turns
:
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The company uses a job rotation system to train employees.
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Crop rotation helps maintain soil fertility.