The Collaborative International Dictionary of English v.0.48:

Bearer \Bear"er\ (b[^a]r"[~e]r), n.
   1. One who, or that which, bears, sustains, or carries.
      "Bearers of burdens." --2 Chron. ii. 18. "The bearer of
      unhappy news." --Dryden.
      [1913 Webster]

   2. Specifically: One who assists in carrying a body to the
      grave; a pallbearer. --Milton.
      [1913 Webster]

   3. A palanquin carrier; also, a house servant. [India]
      [1913 Webster]

   4. A tree or plant yielding fruit; as, a good bearer.
      [1913 Webster]

   5. (Com.) One who holds a check, note, draft, or other order
      for the payment of money; as, pay to bearer.
      [1913 Webster]

   6. (Print.) A strip of reglet or other furniture to bear off
      the impression from a blank page; also, a type or
      type-high piece of metal interspersed in blank parts to
      support the plate when it is shaved.
      [1913 Webster]

WordNet (r) 3.0 (2006):

bearer
    n 1: someone whose employment involves carrying something; "the
         bonds were transmitted by carrier" [syn: carrier,
         bearer, toter]
    2: a messenger who bears or presents; "a bearer of good tidings"
    3: one of the mourners carrying the coffin at a funeral [syn:
       pallbearer, bearer]
    4: the person who is in possession of a check or note or bond or
       document of title that is endorsed to him or to whoever holds
       it; "the bond was marked `payable to bearer'" [syn: holder,
       bearer]

Moby Thesaurus II by Grady Ward, 1.0:

101 Moby Thesaurus words for "bearer":
   Aquarius, Ganymede, Hebe, advocate, alpenstock, arm,
   athletic supporter, back, backbone, backing, bandeau, bheesty, boy,
   bra, brace, bracer, bracket, brassiere, busboy, buttress, caddie,
   cane, cargo handler, carrier, carrier pigeon, carter, cervix,
   common carrier, conveyer, coolie, corset, courier, crook, crutch,
   cupbearer, drayman, emissary, envoy, express, expressman,
   foundation garment, freighter, fulcrum, girdle, griever,
   gun bearer, guy, guywire, hauler, homing pigeon, internuncio, jock,
   jockstrap, keener, lamenter, letter carrier, litter-bearer,
   mainstay, maintainer, mast, mourner, mute, neck, pallbearer,
   porter, professional mourner, prop, redcap, reinforce,
   reinforcement, reinforcer, rest, resting place, rigging,
   shield-bearer, shoulder, shroud, skycap, spine, sprit, staff,
   standing rigging, stave, stay, stevedore, stick, stiffener,
   strengthener, stretcher-bearer, support, supporter, sustainer,
   the Water Bearer, transporter, truck driver, trucker, upholder,
   wagoner, walking stick, water boy, water carrier