sec·tor 
/ˈsɛktɚ/ noun
plural sec·tors /ˈsɛktɚ/ noun [count] 1 : an area of an economy : a part of an economy that includes certain kinds of jobs
▪ the industrial/agricultural/service sector — see also private sector, public sector 2 : an area for which someone (such as a military commander) is responsible
▪ He was assigned to the northern sector. 3 computers : one of the parts that a computer disk is divided into
▪ Data is stored on the disk in 512-byte sectors. 4 geometry : an area in a circle that lies between two straight lines drawn from the center of the circle to the edge of the circle
▪ a 90-degree sector
▪ the industrial/agricultural/service sector — see also private sector, public sector
▪ He was assigned to the northern sector.
▪ Data is stored on the disk in 512-byte sectors.
▪ a 90-degree sector
