1. (noun) sector
a plane figure bounded by two radii and the included arc of a circle
Synonyms: sphere
2. (noun) sector
a social group that forms part of the society or the economy
Synonyms: sphere
3. (noun) sector, sphere
a particular aspect of life or activity
Synonyms: sphere, empyrean, domain, sphere of influence, arena, welkin, area, vault of heaven, celestial sphere, field, orbit, firmament, sector, heavens
4. (noun) sector
the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes
Synonyms: sphere
5. (noun) sector
a portion of a military position
Synonyms: sphere
6. (noun) sector
measuring instrument consisting of two graduated arms hinged at one end
Synonyms: sphere
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Synonyms and Antonyms of sector 
