The term rotation can be used in several way and includes various topics. Generally, it's used to denote the rotation of movement of a rigid body in such a way that any given point of that body remains at a constant distance from some other fixed point

More specifically, it is applicable to:

• The farming practice of crop rotation.
• The business management approach of job rotation.
• The retail practice of rotating stock (especially fresh produce/bread) to ensure the stock with the soonest sell by date is at the front of the shelf - meaning it will be sold first.

In science:

• The differential rotation of objects.
• The optical rotation polarization.

In geometry and mathematics:

• A coordinate rotation is the transformation of coordinate systems.
• An improper rotation producing an inversion.

In music:

• An order operation that may be performed on a set of pitches or pitch classes, where the last member is placed first. Sets which may be mapped onto each other through rotation are rotationally equivalent. See: transformation, permutation

Other:

• Rotation is also the name of a billiards game.

• In baseball pitching, the rotation is the group of starting pitchers for a team, and the order in which they pitch.

• The Rotation Speed of an aircraft is the speed required at take-off for the nose to begin lifting off the runway.