The Collaborative International Dictionary of English v.0.48:

Chauffeur \Chauf`feur"\, n. [F., lit., stoker.]
   1. [pl.] (F. Hist.) Brigands in bands, who, about 1793,
      pillaged, burned, and killed in parts of France; -- so
      called because they used to burn the feet of their victims
      to extort money.
      [Webster 1913 Suppl.]

   2. One who manages the running of an automobile or limousine;
      esp., the paid operator of a motor vehicle.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

chauffeur
    n 1: a man paid to drive a privately owned car
    v 1: drive someone in a vehicle [syn: drive around,
         chauffeur]

Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "chauffeur":
   Sunday driver, backseat driver, bicycle, bike, boy, bus,
   bus driver, busman, butler, cabby, cabdriver, catch a train,
   coachman, cycle, drive, driver, entrain, equerry, gardener,
   gentleman, gillie, go by rail, hack, hackdriver, hackman, hacky,
   hit-and-run driver, houseboy, houseman, jitney driver, joyride,
   joyrider, lord-in-waiting, make a train, man, manservant, motor,
   motorcycle, motorist, pedal, ride, road hog, speeder,
   take a joyride, taxi, taxidriver, teamster, truck driver, trucker,
   truckman, valet, valet de chambre, wheel