rotation (noun)
1: the act of rotating as if on an axis; "the rotation of the dancer kept time with the music" [syn: rotary motion]
2: (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin
3: a single complete turn (axial or orbital); "the plane made three rotations before it crashed"; "the revolution of the earth about the sun takes one year" [syn: revolution, gyration]
4: a planned recurrent sequence (of crops or personnel etc.); "crop rotation makes a balanced demand on the fertility of the soil"; "the manager had only four starting pitchers in his rotation"