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  • noun
    plural -tors
    [count] 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
    an area for which someone (such as a military commander) is responsible
    He was assigned to the northern sector.
    computers :one of the parts that a computer disk is divided into
    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