Sector (Star Trek) definition

(1) Measuring instrument consisting of two graduated arms hinged at one end

(2) A particular aspect of life or activity

"He was helpless in an important sector of his life"

(3) A body of people who form part of society or economy

"The public sector"

(4) A portion of a military position

(5) The minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes

(6) A plane figure bounded by two radii and the included arc of a circle