Source : Webster's Revised Unabridged Dictionary (1913)

Combatant \Com"bat*ant\, a. [F. combattant, p. pr.]
   Contending; disposed to contend. --B. Jonson.

Combatant \Com"bat*ant\, n. [F. combattant.]
   One who engages in combat. ``The mighty combatants.''
   --Milton.

         A controversy which long survived the original
         combatants.                              --Macaulay

Source : WordNet®

combatant
     adj : engaging in or ready for combat
     n : someone who fights (or is fighting) [syn: {battler}, {belligerent},
          {fighter}, {scrapper}]