Definition of "rotation"

rotation

/ɹoʊˈteɪʃən/

noun
countable and uncountable, plural rotations
1. (chiefly uncountable) The act of turning around a centre or an axis.
  Quotations
  An extreme version of vorticity is a vortex. The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.
  2013 March, Frank Fish, George Lauder, “Not Just Going with the Flow”, in American Scientist‎, volume 101, number 2, archived from the original on 1 May 2013, page 114
2. A single complete cycle around a centre or an axis.
3. A regular variation in a sequence, such as to even-out wear, or people taking turns in a task; a duty roster.
4. (mathematics, geometry) An operation on a metric space that is a continuous isometry and fixes at least one point.
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.