- Mathematics.
- The portion of a circle bounded by two radii and the included arc.
- A measuring instrument consisting of two graduated arms hinged together at one end.
- A division of a defensive position for which one military unit is responsible.
- A division of an offensive military position.
- A part or division, as of a city or a national economy: the manufacturing sector; the private sector.
- Computer Science. A portion of a magnetic storage device making up the smallest addressable unit of information.
To divide (something) into sectors.
[Late Latin, from Latin, cutter, from sectus, past participle of secāre, to cut.]
sectorial sec·to'ri·al (-tôr'ē-əl, -tōr'-) adj.


