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sector

/ˈsɛk.təɹ/ noun B2
  1. A section.
  2. 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.
  3. An area designated by boundaries within which a unit operates, and for which it is responsible.
  4. One of the subdivisions of a coastal frontier.
  5. a fictional region of space designated for navigational or governance purposes.
  6. A community or subculture within the wider intermicronational community.
  7. Part of a circle, extending to the center; circular sector.
  8. A portion of a sphere or ball defined by a conical boundary with apex at the center of the sphere.

Plural sectors

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From the library

The logistical efficiency provided by these interconnected routes revolutionized supply chains and significantly bolstered the domestic manufacturing sector across the board.
The Asphalt Arteries: How the Interstates Reshaped America, p. 1 · C2

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.