plural sectors
1
: an area of an economy : a part of an economy that includes certain kinds of jobs
the industrial/agricultural/service sector
2
: an area for which someone (such as a military commander) is responsible
He was assigned to the northern sector.
3
computers
: one of the parts that a computer disk is divided into
Data is stored on the disk in 512-byte sectors.
4
geometry
: an area in a circle that lies between two straight lines drawn from the center of the circle to the edge of the circle
a 90-degree sector
Cite this Entry
“Sector.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/sector. Accessed 21 Jun. 2026.
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