C1noun2K

Rotation

UK /["/rəʊˈteɪʃn/"]/US /["/rəʊˈteɪʃn/"]/

Definition

the action of an object moving in a circle around a central fixed point

In simple words: The act of turning around a central point.

Examples

  • the daily rotation of the earth on its axis
  • the earth's rotation around the sun
  • This switch controls the number of rotations per minute.
  • **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.

Usage notes

Used in both technical and everyday contexts. In formal contexts, it can refer to processes like Earth's rotation. Avoid in informal speech unless discussing sports or mechanics.

Grammar pattern

rotation + of + noun

Memory hint

Think of a merry-go-round (carousel) that rotates around its center.

Collocations

  • rotation of the Earth
  • rotation speed
  • rotation axis
  • rotation schedule
  • counter-clockwise rotation

Synonyms

  • spin
  • turn
  • twist
  • revolution
  • cycle

Antonyms

  • stillness
  • stagnation

Common mistakes

  • Confused with 'revolution' - remember that 'rotation' is about turning, while 'revolution' can mean a full orbit.
  • Incorrectly using 'rotation' as a synonym for 'twist' - they have different meanings.
  • Using 'rotate' when 'rotation' is needed - 'rotate' is a verb, while 'rotation' is a noun.