Source : Webster's Revised Unabridged Dictionary (1913)

Supporter \Sup*port"er\, n.
   1. One who, or that which, supports; as, oxygen is a
      supporter of life.

            The sockets and supporters of flowers are figured.
                                                  --Bacon.

            The saints have a . . . supporter in all their
            miseries.                             --South.

   2. Especially, an adherent; one who sustains, advocates, and
      defends; as, the supporter of a party, faction, or
      candidate.

   3. (Shipbuilding) A knee placed under the cathead.

   4. (Her.) A figure, sometimes of a man, but commonly of some
      animal, placed on either side of an escutcheon, and
      exterior to it. Usually, both supporters of an escutcheon
      are similar figures.

   5. (Med.) A broad band or truss for supporting the abdomen or
      some other part or organ.

Source : WordNet®

supporter
     n 1: a person who backs a politician or a team etc.; "all their
          supporters came out for the game"; "they are friends of
          the library" [syn: {protagonist}, {champion}, {admirer},
           {booster}, {friend}]
     2: someone who supports or champions something [syn: {patron},
        {sponsor}]
     3: a person who contributes to the fulfillment of a need or
        furtherance of an effort or purpose; "my invaluable
        assistant"; "they hired additional help to finish the
        work" [syn: {assistant}, {helper}, {help}]
     4: a band (usually elastic) worn around the leg to hold up a
        stocking (or around the arm to hold up a sleeve) [syn: {garter}]
     5: a support for the genitals worn by men engaging in strenuous
        exercise [syn: {athletic supporter}, {suspensor}, {jockstrap},
         {jock}]