sector
/ˈsɛk.təɹ/ noun
Forms sectors
- noun A section.
- noun (aviation) In the schedule for an aircraft and its crew, the period starting with preparation of the plane before loading at one airport and ending with deplaning at the next.
- noun (military) An area designated by boundaries within which a unit operates, and for which it is responsible.
- noun (military) One of the subdivisions of a coastal frontier.
- noun (science fiction) a fictional region of space designated for navigational or governance purposes.
- noun (micronationalism) A community or subculture within the wider intermicronational community.
- noun (geometry) Part of a circle, extending to the center; circular sector.
- noun (geometry) A portion of a sphere or ball defined by a conical boundary with apex at the center of the sphere.
Synonyms
Etymology
Borrowed from Latin sector.
Webster’s 1913
- noun A part of a circle comprehended between two radii and the included arc.
- noun A mathematical instrument, consisting of two rulers connected at one end by a joint, each arm marked with several scales, as of equal parts, chords, sines, tangents, etc., one scale of each kind on each arm, and all on lines radiating from the common center of motion. The sector is used for plotting, etc., to any scale.
Etymology [L., properly, a cutter, fr. secare, sectum, to cut: cf. F. secteur. See Section.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “sector”, CC BY-SA 4.0. Details