English
rotation
Etymology

Borrowed from Latin rotatiō.

Pronunciation
  • (America) IPA: /ɹoʊˈteɪʃən/
Noun

rotation

  1. (chiefly, uncountable) The act of turning around a centre or an axis.
    The earth's rotation about its axis is responsible for its being slightly oblate rather than a sphere.
  2. A single complete cycle around a centre or an axis.
    Earth's moon completes a rotation every twenty-seven days or so.
  3. A regular variation in a sequence, such as to even out wear, or people taking turns in a task; a duty roster.
    Applying crop rotation to a field avoids depleting soil nutrients the way repeated use of a single crop might do.
    In rotation, each member of the group would be responsible for the beacon fire.
    The medical resident finished a two-week rotation in pediatrics and began one in orthopaedics.
  4. (mathematics, geometry) An operation on a metric space that is a continuous isometry and fixes at least one point.
    The function mapping (x,y) to (−y,x) is a rotation.
  5. (baseball) The set of starting pitchers of a team.
  6. (aviation) The step during takeoff when the pilot commands the vehicle to lift the nose wheel off the ground during the takeoff roll. (see also: V2)
  7. Repeated play on a radio station, etc.
    The new single enjoyed heavy rotation on MTV.
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