Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Latin
Origin: secare; SECTION1

sector

 noun
     
sec‧tor W1 [countable]
1 a part of an area of activity, especially of business, trade etc
sector of
the agricultural sector of the economy
public/private sector (=business controlled by the government or by private companies)
2 one of the parts into which an area is divided, especially for military purposes
Definition from the Longman Dictionary of Contemporary English
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