rotating your tires means to swap the front and rear tires on your car. (in Ebonics, it apparently means something like "to drive"; see Ebonics Language Lesson)

some people think that quickly-rotating supercooled, superconducting ceramic discs act as a gravity shield, but they are largely viewed as raving lunatics by the scientific community

Ro"tate (?), a. [L. rotatus, p.p. of rotare to turn round like a wheel, fr. rota wheel. See Rotary, and cf. Roue.]

Having the parts spreading out like a wheel; wheel-shaped; as, a rotate spicule or scale; a rotate corolla, i.e., a monopetalous corolla with a flattish border, and no tube or a very short one.

© Webster 1913.

Ro"tate (?), v. i. [imp. & p. p. Rotated (?); p. pr. & vb. n. Rotating.]

1.

To turn, as a wheel, round an axis; to revolve.

2.

To perform any act, function, or operation in turn, to hold office in turn; as, to rotate in office.

© Webster 1913.

Ro"tate, v. i.

1.

To cause to turn round or revolve, as a wheel around an axle.

2.

To cause to succeed in turn; esp., to cause to succeed some one, or to be succeeded by some one, in office.

Harper's Mag.

© Webster 1913.