STRATEGY - The art of planning operations in war, esp. of the movements
of armies and navies

• noun (pl. strategies) 1 a plan designed to achieve a particular long-term aim.

2.
2 the art of planning and directing military activity in a war or battle. Often contrasted with tactics

1. [n] an elaborate and systematic plan of action
2. [n] the branch of military science dealing with military command and the planning and conduct of a war

1. The science of military command, or the science of projecting campaigns and directing great military movements; generalship.

2. The use of stratagem or artifice.

a. The science and art of using all the forces of a nation to execute approved plans as effectively as possible during peace or war.
b. The science and art of military command as applied to the overall planning and conduct of large-scale 2. combat operations.
3. A plan of action resulting from strategy or intended to accomplish a specific goal. See synonyms at plan.
The art or skill of using stratagems in endeavors such as politics and business.
[French stratégie, from Greek stratēgiā, office of a general, from stratēgos, general. See stratagem.]

WordNet:
1. an elaborate and systematic plan of action
  Synonym: scheme
2. the branch of military science dealing with military command and the planning and conduct of a war

Military:
(DOD) The art and science of developing and employing instruments of national power in a synchronized and integrated fashion to achieve theater, national, and/or multinational objectives. See also military strategy; national strategy.

Wikipedia:
A strategy is a long term plan of action designed to achieve a particular goal.