Definition of rotation noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//rəʊˈteɪʃn//
    ; NAmE NAmE//roʊˈteɪʃn//
    Growing crops, The universe
    jump to other results
  1. 1[uncountable] the action of an object moving in a circle around a central fixed point the daily rotation of the earth on its axis See related entries: The universe
  2. 2[countable] one complete movement in a circle around a fixed point This switch controls the number of rotations per minute.
  3. 3[uncountable, countable] 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) job rotation (= the practice of regularly changing the job that a particular person does so that they become experienced in different areas) Wheat, maize and sugar beet are planted in rotation. The committee is chaired by all the members in rotation. See related entries: Growing crops
  4. Word Originmid 16th cent.: from Latin rotatio(n-), from the verb rotare, from rota ‘wheel’.Extra examples crops planted in rotation the earth’s rotation around the sun the rotation of the planet on its axis The length of a day is based on the rotation of the earth on its axis.
See the Oxford Advanced American Dictionary entry: rotation