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"

Moby Thesaurus II by Grady Ward, 1.0:

120 Moby Thesaurus words for "rotate":
   advance, alternate, ascend, back, back up, bandy, be here again,
   become airborne, budge, change, change place, circle, circulate,
   circumrotate, circumvolute, clear, climb, come again, come and go,
   come around, come round, come round again, come up again, convert,
   crank, cycle, descend, ebb, ensue, evert, exchange, flow,
   fly aloft, follow, get over, go, go around, go round, go sideways,
   gyrate, gyre, interchange, intermit, introvert, intussuscept,
   invaginate, inverse, invert, jump off, leave the ground, mount,
   move, move over, oscillate, pirouette, pivot, plunge, progress,
   pronate, pulsate, pulse, reappear, recur, reel, regress, relieve,
   reoccur, repeat, resupinate, retrogress, return, reverse, revolve,
   rise, roll, roll around, round, run, screw, shift, sink, soar,
   spell, spin, stir, stream, subside, succeed, supinate, swap, swing,
   switch, swivel, take off, take turns, taxi, transpose, travel,
   turn, turn a pirouette, turn about, turn around, turn down,
   turn in, turn inside out, turn out, turn over, turn round,
   turn the scale, turn the tables, turn upside down, twirl, twist,
   undulate, wamble, wane, wheel, wheel around, whirl, wind