rotation in WordNet English dictionary

1. 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  revolution  gyration 
   
2. the act of rotating as if on an axis
   "the rotation of the dancer kept time with the music"
   rotation  rotary motion 
   
3. 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"
   rotation 
   
4. (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin
   rotation