Source : Webster's Revised Unabridged Dictionary (1913)

Noncombatant \Non*com"bat*ant\, n. (Mil.)
   Any person connected with an army, or within the lines of an
   army, who does not make it his business to fight, as any one
   of the medical officers and their assistants, chaplains, and
   others; also, any of the citizens of a place occupied by an
   army; also, any one holding a similar position with respect
   to the navy.

Source : WordNet®

noncombatant
     adj 1: used of civilians in time of war
     2: member of armed forces whose duties do not include fighting
        as e.g. a chaplain or surgeon
     n : a member of the armed forces who does not participate in
         combat (e.g. a chaplain or surgeon)