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2 ADJ [usu ADJ n] Strategic weapons are very powerful missiles that can be fired only after a decision to use them has been made by a political leader. □  …strategic nuclear weapons.

3 ADJ [usu ADJ n] If you put something in a strategic position, you place it cleverly in a position where it will be most useful or have the most effect. □  …the marble benches Eve had placed at strategic points throughout the gardens, where the views were spectacular. ●  stra|tegi|cal|ly ADV [usu ADV -ed] □  We had kept its presence hidden with a strategically placed chair. SYNONYMS strategic ADJ 1

tactical:The security forces had made a tactical withdrawal from the area.

calculated:The President took a calculated political risk in throwing his full support behind the rebels.

deliberate:It has a deliberate policy to introduce world art to Britain.

strat|egist /stræ tədʒ I st/ (strategists ) N‑COUNT A strategist is someone who is skilled in planning the best way to gain an advantage or to achieve success, especially in war. □  Military strategists had devised a plan that guaranteed a series of stunning victories.

strat|egy ◆◆◇ /stræ tədʒi/ (strategies )

1 N‑VAR A strategy is a general plan or set of plans intended to achieve something, especially over a long period. □  The group hope to agree a strategy for policing the area. □  What should our marketing strategy have achieved?

2 N‑UNCOUNT Strategy is the art of planning the best way to gain an advantage or achieve success, especially in war. □  I've just been explaining the basic principles of strategy to my generals. COLLOCATIONS strategy NOUN 1

noun + strategy : business, growth, investment, marketing

adjective + strategy : clear, coherent, effective, long-term; high-risk, risky; corporate, economic, global, military

verb + strategy : adopt, devise, implement, pursue SYNONYMS strategy NOUN 2

policy:…the government's policy on repatriation.

procedure:The White House said there would be no change in procedure.

strati|fi|ca|tion /stræ t I f I ke I ʃ ^ə n/ N‑UNCOUNT Stratification is the division of something, especially society, into different classes or layers. [FORMAL ] □ [+ of ] She was concerned about the stratification of American society.

strati|fied /stræ t I fa I d/ ADJ A stratified society is one that is divided into different classes or social layers. [FORMAL ] □  …a highly stratified, unequal and class-divided society.

strato|sphere /stræ təsf I ə ^r /

1 N‑SING The stratosphere is the layer of the earth's atmosphere which lies between 10 and 50 kilometres above the earth.

2 N‑SING If you say that someone or something climbs or is sent into the stratosphere , you mean that they reach a very high level. [JOURNALISM ] □  This was enough to launch their careers into the stratosphere.

strato|spher|ic /stræ təsfe r I k, [AM ] -f I r I k/ ADJ [ADJ n] Stratospheric means found in or related to the stratosphere. □  …stratospheric ozone.

stra|tum /strɑː təm, [AM ] stre I təm/ (strata )

1 N‑COUNT A stratum of society is a group of people in it who are similar in their education, income, or social status. [FORMAL ] □ [+ of ] It was an enormous task that affected every stratum of society.

2 N‑COUNT [usu pl] Strata are different layers of rock. [TECHNICAL ] □  Shale gas is methane trapped in rock strata.

straw /strɔː / (straws )

1 N‑UNCOUNT Straw consists of the dried, yellowish stalks from crops such as wheat or barley. □  The barn was full of bales of straw. □  …a wide-brimmed straw hat.