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

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

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.

An instrument used for measuring the dip of the horizon.

Used other than figuratively or idiomatically: see married, sector.

(astrophysics, cosmology, astronomy, physics) The unknown portion of the Universe outside standard physics, including dark matter and dark energy.

The economic sector consisting of non-governmental nonprofits.

(economics) The branch of a country's economy where high-level decisions are made by top-level executives in government, industry, education, etc.