The Collaborative International Dictionary of English v.0.48:

Military \Mil"i*ta*ry\, a. [L. militaris, militarius, from
   miles, militis, soldier: cf. F. militaire.]
   [1913 Webster]
   1. Of or pertaining to soldiers, to arms, or to war;
      belonging to, engaged in, or appropriate to, the affairs
      of war; as, a military parade; military discipline;
      military bravery; military conduct; military renown.
      [1913 Webster]

            Nor do I, as an enemy to peace,
            Troop in the throngs of military men. --Shak.
      [1913 Webster]

   2. Performed or made by soldiers; as, a military election; a
      military expedition. --Bacon.
      [1913 Webster]

   Military law. See Martial law, under Martial.

   Military order. (a) A command proceeding from a military
      superior.
      (b) An association of military persons under a bond of
          certain peculiar rules; especially, such an
          association of knights in the Middle Ages, or a body
          in modern times taking a similar form, membership of
          which confers some distinction.

   Military tenure, tenure of land, on condition of performing
      military service.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Military \Mil"i*ta*ry\, n. [Cf. F. militaire.]
   The whole body of soldiers; soldiery; militia; troops; the
   army.
   [1913 Webster]

WordNet (r) 3.0 (2006):

military
    adj 1: of or relating to the study of the principles of warfare;
           "military law"
    2: characteristic of or associated with soldiers or the
       military; "military uniforms" [ant: nonmilitary,
       unmilitary]
    3: associated with or performed by members of the armed services
       as contrasted with civilians; "military police" [ant:
       civilian]
    n 1: the military forces of a nation; "their military is the
         largest in the region"; "the military machine is the same
         one we faced in 1991 but now it is weaker" [syn:
         military, armed forces, armed services, military
         machine, war machine]

Moby Thesaurus II by Grady Ward, 1.0:

76 Moby Thesaurus words for "military":
   aggressive, air force, antagonistic, armed force, armed forces,
   armed service, army, array, battling, bellicose, belligerent,
   bloodthirsty, bloody, bloody-minded, career soldiers, chauvinist,
   chauvinistic, combative, contentious, enemy, ferocious, fierce,
   fighting, fighting machine, forces, full of fight, ground forces,
   ground troops, hawkish, host, hostile, inimical, jingo, jingoish,
   jingoist, jingoistic, legions, martial, militant, militaristic,
   military establishment, naval, navy, occupation force, offensive,
   paratroops, pugnacious, quarrelsome, rank and file, ranks,
   regular army, regulars, saber-rattling, sanguinary, sanguineous,
   savage, scrappy, service, ski troops, soldierlike, soldierly,
   soldiery, standing army, storm troops, the line, the military,
   trigger-happy, troops, truculent, unfriendly, unpacific,
   unpeaceable, unpeaceful, warlike, warmongering, warring