rotation

noun

1. 1

   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. 2

   A single complete cycle around a centre or an axis.

   “Earth's moon completes a rotation every twenty-seven days or so.”

3. 3

   A regular variation in a sequence, such as to even-out wear, or people taking turns in a task; a duty roster.

   “In rotation, each member of the group would be responsible for the beacon fire.”

4. 4

   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. 5

   The set of starting pitchers of a team.

6. 6

   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. 7

   Repeated play on a radio station, etc.

   “The new single enjoyed heavy rotation on MTV.”