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English definition of “sector”

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sector

noun [C] uk   /ˈsek.tər/ us    /-tɚ/

sector noun [C] (ECONOMIC AREA)

C1 one of the areas into which the economic activity of a country is divided: In the financial sector, banks and insurance companies have both lost a lot of money. The new government's policy is to transfer state industries from the public sector to the private sector.
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sector noun [C] (CONTROLLED AREA)

an area of land or sea that has been divided from other areas and is controlled by a particular country: What is the total oil output from the British sector of the North Sea?
(Definition of sector from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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