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

Alternative spelling of circular sector

(law) Something that must not be removed or modified during redistribution. / (mathematics) A section that will not vary through changing state.

The part of an orchestra formed by brass instruments.

(weaponry) squad automatic weapon, a class of light machine gun; a machine gun issued to a section of troops, being heavier than the standard assault rifle and personal machine guns issued per trooper.

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

(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.

The section of a band maintaining the rhythm, consisting of e.g. drums, bass, keyboard, etc.

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