Quick definitions from WordNet (sector)
▸ noun: measuring instrument consisting of two graduated arms hinged at one end
▸ noun: a particular aspect of life or activity ("He was helpless in an important sector of his life")
▸ noun: a body of people who form part of society or economy ("The public sector")
▸ noun: a portion of a military position
▸ noun: the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes
▸ noun: a plane figure bounded by two radii and the included arc of a circle
▸ Also see sector
▸ noun: measuring instrument consisting of two graduated arms hinged at one end
▸ noun: a particular aspect of life or activity ("He was helpless in an important sector of his life")
▸ noun: a body of people who form part of society or economy ("The public sector")
▸ noun: a portion of a military position
▸ noun: the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes
▸ noun: a plane figure bounded by two radii and the included arc of a circle
▸ Also see sector