Significat

1. The act of turning around a centre or an axis.
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. An operation on a metric space that is a continuous isometry and fixes at least one point.
5. The set of starting pitchers of a team.
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. Repeated play on a radio station, etc.