Meaning of ROTATION in English

ROTATION

/ rəʊˈteɪʃn; NAmE roʊ-/ noun

1.

[ U ] the action of an object moving in a circle around a central fixed point :

the daily rotation of the earth on its axis

2.

[ C ] one complete movement in a circle around a fixed point :

This switch controls the number of rotations per minute.

3.

[ U , C ] the act of regularly changing the thing that is being used in a particular situation, or of changing the person who does a particular job :

crop rotation / the rotation of crops (= changing the crop that is grown on an area of land in order to protect the soil)

Wheat, maize and sugar beet are planted in rotation .

The committee is chaired by all the members in rotation .

►  ro·ta·tion·al / -ʃənl; NAmE / adjective [ only before noun ]

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WORD ORIGIN

mid 16th cent.: from Latin rotatio(n-) , from the verb rotare , from rota wheel.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.