The Collaborative International Dictionary of English v.0.48:

Strategy \Strat"e*gy\, n. [Gr. ?: cf. F. strat['e]gie. See
   Stratagem.]
   1. The science of military command, or the science of
      projecting campaigns and directing great military
      movements; generalship.
      [1913 Webster]

   2. The use of stratagem or artifice.
      [1913 Webster]

WordNet (r) 3.0 (2006):

strategy
    n 1: an elaborate and systematic plan of action [syn: scheme,
         strategy]
    2: the branch of military science dealing with military command
       and the planning and conduct of a war

Moby Thesaurus II by Grady Ward, 1.0:

115 Moby Thesaurus words for "strategy":
   aerial tactics, airborne tactics, applied tactics, approach,
   armored tactics, arrangement, art, artful dodge, artifice, attack,
   barrier tactics, blind, blueprint, blueprinting, calculation,
   cavalry tactics, charting, chicanery, conception, conspiracy,
   contrivance, coup, craft, cute trick, deceit, defensive strategy,
   design, device, disposition, diversion, dodge, encirclement,
   enterprise, envisagement, expedient, fakement, feint, fetch,
   figuring, fire tactics, foresight, forethought, gambit, game,
   game plan, gimmick, graphing, grift, ground plan, guidelines, idea,
   infantry tactics, infiltration, intention, intrigue, investment,
   jugglery, knavery, layout, lineup, little game, long-range plan,
   maneuver, mapping, master plan, method, methodology, mob tactics,
   mobile tactics, move, operations research, organization,
   pincers movement, plan, planning, planning function, plot, ploy,
   policy, prearrangement, procedure, program, program of action,
   project, racket, rationalization, red herring, ruse, scenario,
   schedule, schema, schematism, schematization, scheme,
   scheme of arrangement, setup, shift, shock tactics, sleight,
   stratagem, strategic plan, subterfuge, system, systematization,
   tactic, tactical plan, tactics, the big picture, the picture,
   trick, trickery, way, wile, wily device, working plan