sector
//ˈsɛktər//
Noun
sectorSingular
sectorsPlural
1
A distinct part or branch of a nation's economy or society, or of a sphere of activity such as education
The government is investing heavily in the education sector.
2
A part or subdivision of an area, especially for military operations or administrative purposes
The city was divided into four sectors for the rescue operation.
3
A mathematical plane figure bounded by two radii of a circle and the arc between them
Calculate the area of a sector with a radius of 5 cm and a central angle of 60 degrees.
4
A subdivision of a defensive military position
The troops were assigned to defend the northern sector.