The Collaborative International Dictionary of English v.0.48:

Carrier \Car"ri*er\, n. [From Carry.]
   1. One who, or that which, carries or conveys; a messenger.
      [1913 Webster]

            The air which is but . . . a carrier of the sounds.
                                                  --Bacon.
      [1913 Webster]

   2. One who is employed, or makes it his business, to carry
      goods for others for hire; a porter; a teamster.
      [1913 Webster]

            The roads are crowded with carriers, laden with rich
            manufactures.                         --Swift.
      [1913 Webster]

   3. (Mach.) That which drives or carries; as:
      (a) A piece which communicates to an object in a lathe the
          motion of the face plate; a lathe dog.
      (b) A spool holder or bobbin holder in a braiding machine.
          (c) A movable piece in magazine guns which transfers
          the cartridge to a position from which it can be
          thrust into the barrel.
          [1913 Webster]

   Carrier pigeon (Zool.), a variety of the domestic pigeon
      used to convey letters from a distant point to to its
      home.

   Carrier shell (Zool.), a univalve shell of the genus
      Phorus; -- so called because it fastens bits of stones
      and broken shells to its own shell, to such an extent as
      almost to conceal it.

   Common carrier (Law.) See under Common, a.
      [1913 Webster]

WordNet (r) 3.0 (2006):

carrier
    n 1: someone whose employment involves carrying something; "the
         bonds were transmitted by carrier" [syn: carrier,
         bearer, toter]
    2: a self-propelled wheeled vehicle designed specifically to
       carry something; "refrigerated carriers have revolutionized
       the grocery business"
    3: a large warship that carries planes and has a long flat deck
       for takeoffs and landings [syn: aircraft carrier,
       carrier, flattop, attack aircraft carrier]
    4: an inactive substance that is a vehicle for a radioactive
       tracer of the same substance and that assists in its recovery
       after some chemical reaction
    5: a person or firm in the business of transporting people or
       goods or messages [syn: carrier, common carrier]
    6: a radio wave that can be modulated in order to transmit a
       signal [syn: carrier wave, carrier]
    7: a man who delivers the mail [syn: mailman, postman, mail
       carrier, letter carrier, carrier]
    8: a boy who delivers newspapers [syn: carrier, newsboy]
    9: (medicine) a person (or animal) who has some pathogen to
       which he is immune but who can pass it on to others [syn:
       carrier, immune carrier]
    10: a rack attached to a vehicle; for carrying luggage or skis
        or the like
    11: (genetics) an organism that possesses a recessive gene whose
        effect is masked by a dominant allele; the associated trait
        is not apparent but can be passed on to offspring

Moby Thesaurus II by Grady Ward, 1.0:

177 Moby Thesaurus words for "carrier":
   Aquarius, Ganymede, Hebe, Hermes, Iris, Mercury, Paul Revere,
   Pheidippides, advocate, aerial infection, airborne infection,
   aircraft, aircraft carrier, alpenstock, arm, athletic supporter,
   back, backbone, backing, bandeau, bearer, bheesty,
   biological vector, bra, brace, bracer, bracket, brassiere, busboy,
   buttress, caddie, cane, cargo handler, carriage, carrier pigeon,
   carrier wave, carter, cervix, commissionaire, common carrier,
   communicability, contagion, contagiousness, contamination,
   conveyance, conveyer, coolie, corset, courier, crook, crutch,
   cryptogenic infection, cupbearer, diplomatic courier,
   direct infection, drayman, droplet infection, dust infection,
   electric wave, electromagnetic wave, emissary, envoy, epidemiology,
   estafette, express, expressman, flattop, foundation garment,
   freighter, fulcrum, girdle, go-between, ground wave, gun bearer,
   guy, guywire, hand infection, hauler, hertzian wave,
   high-frequency wave, homer, homing pigeon, indirect infection,
   infection, infectiousness, internuncio, jock, jockstrap,
   letter carrier, litter-bearer, long wave, low-frequency wave,
   mail car, mail coach, mail packet, mail train, mail truck, mailer,
   mailplane, mainstay, maintainer, mast, mechanical vector,
   medium of transportation, message-bearer, messenger, microwave,
   neck, nuncio, packet boat, phytogenic infection, pigeon post,
   porter, post, post boat, post car, post coach, post-horse,
   post-office car, postboy, poster, postrider, primary infection,
   prop, pyogenic infection, radio wave, railway mail car, redcap,
   reinforce, reinforcement, reinforcer, rest, resting place, rigging,
   runner, seaplane carrier, secondary infection, shield-bearer,
   shipper, shortwave, shoulder, shroud, sky wave, skycap, spine,
   sprit, staff, standing rigging, stave, stay, stevedore, stick,
   stiffener, strengthener, stretcher-bearer, subclinical infection,
   support, supporter, sustainer, taint, the Water Bearer,
   transmitter, transporter, truck driver, trucker, upholder, vector,
   vehicle, virus, wagoner, walking stick, water boy, water carrier,
   waterborne infection, watercraft, wavelength, zoogenic infection



U.S. Gazetteer Places (2000):

Carrier, OK -- U.S. town in Oklahoma
   Population (2000):    77
   Housing Units (2000): 30
   Land area (2000):     1.216976 sq. miles (3.151954 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.216976 sq. miles (3.151954 sq. km)
   FIPS code:            12200
   Located within:       Oklahoma (OK), FIPS 40
   Location:             36.476654 N, 98.020572 W
   ZIP Codes (1990):     73727
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Carrier, OK
    Carrier