Noun

• S: (n) sector (a plane figure bounded by two radii and the included arc of a circle)
• S: (n) sector (a social group that forms part of the society or the economy) "the public sector"
• S: (n) sector, sphere (a particular aspect of life or activity) "he was helpless in an important sector of his life"
• S: (n) sector (the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes)
• S: (n) sector (a portion of a military position)
• S: (n) sector (measuring instrument consisting of two graduated arms hinged at one end)