rotation, rotary motion -- (the act of rotating as if on an axis; "the rotation of the dancer kept time with the music")
rotation -- ((mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin)
rotation, revolution, gyration -- (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")
rotation -- (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")