n.
Pronunciation: ' sek-t ə r, - ˌ to ̇ r
Function: noun
Etymology: Late Latin, from Latin, cutter, from secare to cut ― more at SAW
Date: 1570
1 a : a geometric figure bounded by two radii and the included arc of a circle b (1) : a subdivision of a defensive military position (2) : a portion of a military front or area of operation c : an area or portion resembling a sector <bilingual sector of town ― David Kleinberg> d : a sociological, economic, or political subdivision of society <cooperation between the public and private sector s ― Peter Chapman>
2 : a mathematical instrument consisting of two rulers connected at one end by a joint and marked with several scales
3 : a subdivision of a track on a computer disk
– sec · tor · al \ ' sek-t( ə -)r ə l \ adjective