The Collaborative International Dictionary of English v.0.48:

Tactics \Tac"tics\, n. [Gr. taktika` pl., and taktikh` (sc.
   te`chnh, sing., fr. taktiko`s fit for ordering or arranging,
   fr. ta`ssein, ta`ttein, to put in order, to arrange: cf. F.
   tactique.]
   1. The science and art of disposing military and naval forces
      in order for battle, and performing military and naval
      evolutions. It is divided into grand tactics, or the
      tactics of battles, and elementary tactics, or the tactics
      of instruction.
      [1913 Webster]

   2. Hence, any system or method of procedure.
      [1913 Webster]

WordNet (r) 3.0 (2006):

tactics
    n 1: the branch of military science dealing with detailed
         maneuvers to achieve objectives set by strategy
    2: a plan for attaining a particular goal [syn: tactic,
       tactics, maneuver, manoeuvre]

Moby Thesaurus II by Grady Ward, 1.0:

134 Moby Thesaurus words for "tactics":
   action, actions, activity, acts, address, aerial tactics,
   affectation, air, airborne tactics, applied tactics, approach,
   armored tactics, arrangement, attack, barrier tactics, bearing,
   behavior, behavior pattern, behavioral norm, behavioral science,
   behind-the-scenes influence, blueprint, blueprinting, calculation,
   carriage, cavalry tactics, charting, comportment, conception,
   conduct, contrivance, culture pattern, custom, defensive strategy,
   demeanor, deportment, design, device, devices, disposition,
   diversion, doing, doings, encirclement, enterprise, envisagement,
   expedients, feint, figuring, fire tactics, folkway, foresight,
   forethought, game, gestures, goings-on, graphing, ground plan,
   guidelines, guise, idea, infantry tactics, infiltration, influence,
   intention, investment, layout, lineup, long-range plan,
   machination, maintien, maneuvering, maneuvers, manipulation,
   manner, manners, mapping, master plan, method, methodology,
   methods, mien, mob tactics, mobile tactics, modus vivendi, motions,
   movements, moves, observable behavior, operations research,
   organization, pattern, pincers movement, plan, planning,
   planning function, poise, political influence, port, pose, posture,
   practice, praxis, prearrangement, presence, procedure, proceeding,
   program, program of action, rationalization, schedule, schema,
   schematism, schematization, scheme, scheme of arrangement, setup,
   shock tactics, social science, strategic plan, strategy, style,
   system, systematization, tactical maneuvers, tactical plan,
   the big picture, the picture, tone, way, way of life, ways,
   wire-pulling, working plan