(business) All organizations in an economy or jurisdiction that are not controlled by government, including privately owned businesses and not-for-profit organizations.

(economics) The sector of the economy that principally produces raw materials for use by other sectors.

(economics) The sector of the economy that principally uses raw materials produced by the primary sector for sale and use by other sectors.

plural of tertiary sector

(economics) The sector of the economy that principally provides goods and services to consumers using goods produced by the other sectors.

plural of secondary sector

plural of primary sector

Alternative spelling of circular sector

(geometry) A portion of a circle enclosed by two radii and an arc.

(computing) A dedicated sector, usually at the beginning (first sector on first track) of a storage medium, that holds special data used to start a system.