What does "rotate" mean?

Additional senses

1. 2.To perform any act, function, or operation in turn, to hold office in turn; as, to rotate in office.
2. 3.To cause to turn round or revolve, as a wheel around an axle.
3. 4.To cause to succeed in turn; esp., to cause to succeed some one, or to be succeeded by some one, in office. [Colloq.] "Both, after a brief service, were rotated out of office." Harper's Mag.