Definitions: (noun) A sector is a part or division of an area, especially part of the economy.
Examples: (noun) I am going to go patrol the south sector. (noun) The government is placing a large number of private businesses in the public sector. (noun) Service sector jobs, such as restaurant jobs, are often low paying.
Synonyms: nouns: area, division, part.
Academic Word List Sublist and Group: 1 A