The Collaborative International Dictionary of English v.0.48:

Rotate \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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rotate \Ro"tate\, v. i. [imp. & p. p. Rotated; p. pr. & vb. n.
   Rotating.]
   1. To turn, as a wheel, round an axis; to revolve.
      [1913 Webster]

   2. To perform any act, function, or operation in turn, to
      hold office in turn; as, to rotate in office.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rotate \Ro"tate\, v. i.
   1. To cause to turn round or revolve, as a wheel around an
      axle.
      [1913 Webster]

   2. 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.
      [1913 Webster]

WordNet (r) 3.0 (2006):

rotate
    v 1: turn on or around an axis or a center; "The Earth revolves
         around the Sun"; "The lamb roast rotates on a spit over the
         fire" [syn: revolve, go around, rotate]
    2: exchange on a regular basis; "We rotate the lead soprano
       every night"
    3: perform a job or duty on a rotating basis; "Interns have to
       rotate for a few months"
    4: cause to turn on an axis or center; "Rotate the handle" [syn:
       rotate, circumvolve]
    5: turn outward; "These birds can splay out their toes"; "ballet
       dancers can rotate their legs out by 90 degrees" [syn: turn
       out, splay, spread out, rotate]
    6: plant or grow in a fixed cyclic order of succession; "We
       rotate the crops so as to maximize the use of the soil"