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English definition of “rotation”

rotation

noun uk   /rəʊˈteɪ.ʃən/ us    /roʊ-/
[U] movement in a circle around a fixed point: the speed of rotation [C] a complete circular movement around a fixed point: The Earth completes 366 rotations about its axis in every leap year. [C or U] the act by farmers of regularly changing which crops they grow in a field: crop rotation [U] the act of different people doing the same job at different times: the rotation of key positions such as that of chairman
(Definition of rotation from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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