Definition of sector
1a : a geometric figure bounded by two radii and the included arc of a circleb (1) : a subdivision of a defensive military position (2) : a portion of a military front or area of operationc : an area or portion resembling a sector bilingual sector of town — David Kleinbergd : a sociological, economic, or political subdivision of society cooperation between the public and private sectors — Peter Chapman
2 : a mathematical instrument consisting of two rulers connected at one end by a joint and marked with several scales
3 : a subdivision of a track on a computer disk
Examples of sector in a sentence
He was assigned to the northern sector.
Data is stored on the disk in 512-byte sectors.
Origin and Etymology of sector
Late Latin, from Latin, cutter, from secare to cut — more at saw
First Known Use: 1570
First Known Use of sector
SECTOR Defined for English Language Learners
Definition of sector for English Language Learners
: an area of an economy : a part of an economy that includes certain kinds of jobs
: an area for which someone (such as a military commander) is responsible
computers : one of the parts that a computer disk is divided into
SECTOR Defined for Kids
Definition of sector for Students
: a part of an area or of a sphere of activity the industrial sector of the economy
Seen and Heard
What made you want to look up sector? Please tell us where you read or heard it (including the quote, if possible).