Meaning of “sector” in the English Dictionary

"sector" in British English

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sectornoun [ C ]

uk /ˈsek.tər/ us /ˈsek.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 country has a new policy of transferring state industries from the public sector to the private sector.

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(Definition of “sector” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"sector" in American English

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sectornoun [ C ]

us /ˈsek·tər/

a part of society that can be separated from other parts because of its own special character:

the farm sector
the nonprofit sector
She works in the private/public sector (= for a business/government)

A sector is also an area of land or sea that has been divided from other areas:

The buildings are in an industrial sector in the southern part of the city.

(Definition of “sector” from the Cambridge Academic Content Dictionary © Cambridge University Press)

(Definition of “sector” from the Cambridge Business English Dictionary © Cambridge University Press)