The Collaborative International Dictionary of English v.0.48:

Parlor \Par"lor\, n. [OE. parlour, parlur, F. parloir, LL.
   parlatorium. See Parley.] [Written also parlour.]
   1. A room for business or social conversation, for the
      reception of guests, etc. Specifically:
      (a) The apartment in a monastery or nunnery where the
          inmates are permitted to meet and converse with each
          other, or with visitors and friends from without.
          --Piers Plowman.
      (b) In large private houses, a sitting room for the family
          and for familiar guests, -- a room for less formal
          uses than the drawing-room. Esp., in modern times, the
          dining room of a house having few apartments, as a
          London house, where the dining parlor is usually on
          the ground floor.
      (c) Commonly, in the United States, a drawing-room, or the
          room where visitors are received and entertained; a
          room in a private house where people can sit and talk
          and relax, not usually the same as the dining room.
          [1913 Webster +PJC]

   Note: "In England people who have a drawing-room no longer
         call it a parlor, as they called it of old and till
         recently." --Fitzed. Hall.
         [1913 Webster]

   2. A room in an inn or club where visitors can be received.
      [WordNet 1.5]

   Parlor car. See Palace car, under Car.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Car \Car\, n. [OF. car, char, F. cahr, fr. L. carrus, Wagon: a
   Celtic word; cf. W. car, Armor. karr, Ir. & Gael. carr. cf.
   Chariot.]
   1. A small vehicle moved on wheels; usually, one having but
      two wheels and drawn by one horse; a cart.
      [1913 Webster]

   2. A vehicle adapted to the rails of a railroad. [U. S.]
      [1913 Webster]

   Note: In England a railroad passenger car is called a railway
         carriage; a freight car a goods wagon; a platform car a
         goods truck; a baggage car a van. But styles of car
         introduced into England from America are called cars;
         as, tram car. Pullman car. See Train.
         [1913 Webster]

   3. A chariot of war or of triumph; a vehicle of splendor,
      dignity, or solemnity. [Poetic].
      [1913 Webster]

            The gilded car of day.                --Milton.
      [1913 Webster]

            The towering car, the sable steeds.   --Tennyson.
      [1913 Webster]

   4. (Astron.) The stars also called Charles's Wain, the Great
      Bear, or the Dipper.
      [1913 Webster]

            The Pleiads, Hyads, and the Northern Car. --Dryden.
      [1913 Webster]

   5. The cage of a lift or elevator.
      [1913 Webster]

   6. The basket, box, or cage suspended from a balloon to
      contain passengers, ballast, etc.
      [1913 Webster]

   7. A floating perforated box for living fish. [U. S.]
      [1913 Webster]

   Car coupling, or Car coupler, a shackle or other device
      for connecting the cars in a railway train. [U. S.]

   Dummy car (Railroad), a car containing its own steam power
      or locomotive.

   Freight car (Railrood), a car for the transportation of
      merchandise or other goods. [U. S.]

   Hand car (Railroad), a small car propelled by hand, used by
      railroad laborers, etc. [U. S.]

   Horse car, or Street car, an omnibus car, draw by horses
      or other power upon rails laid in the streets. [U. S.]

   Palace car, Drawing-room car, Sleeping car, Parlor
   car, etc. (Railroad), cars especially designed and furnished
      for the comfort of travelers.
      [1913 Webster]

WordNet (r) 3.0 (2006):

parlor car
    n 1: a passenger car for day travel; you pay extra fare for
         individual chairs [syn: parlor car, parlour car,
         drawing-room car, palace car, chair car]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "parlor car":
   Pullman, Pullman car, baggage car, boxcar, caboose, car, carriage,
   chair car, coach, coal car, covered waggon, day coach, diner,
   dinghy, dining car, drawing room, flat, flatcar, gondola, local,
   luggage van, mail car, mail van, palace car, passenger car,
   railway car, reefer, refrigerator car, roomette, saloon, sleeper,
   smoker, smoking car, stateroom, stockcar, tank, tender, truck, van,
   waggon