sector

n. subdivision, group within a larger group; region, district; geometrical figure composed of two radii and the arc lying between the radii (Mathematics); unit of disk storage equal to 256 bytes (Computers)

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Noun
1. a plane figure bounded by two radii and the included arc of a circle
(hypernym) plane figure, two-dimensional figure
(part-meronym) arc
2. a body of people who form part of society or economy; "the public sector"
(hypernym) body
(hyponym) business, business sector
(part-holonym) society
3. a particular aspect of life or activity; "he was helpless in an important sector of his life"
(synonym) sphere
(hypernym) aspect, facet
(hyponym) department
4. the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes
(hypernym) computer memory unit
(part-holonym) block
5. a portion of a military position
(hypernym) tract, piece of land, piece of ground, parcel of land, parcel
(part-holonym) battlefield, battleground, field of battle, field of honor, field
(classification) military, armed forces, armed services, military machine, war machine
6. measuring instrument consisting of two graduated arms hinged at one end
(hypernym) measuring instrument, measuring system, measuring device

nm. neighborhood; sector; quadrant; section

n. sector