The meaning of SECTOR is a geometric figure bounded by two radii and the included arc of a circle. How to use sector in a sentence. Indian Economy and Its Sectors: The three dominant sectors of the Indian economy are the primary sector , the secondary sector , and the tertiary sector . At the point when we talk about the style of activity, the Indian economy can be separated into two areas or sectors that are unorganised sector and organised sector . Based on the type of produce, the sector is classified as the primary, secondary, tertiary, quarternary, and quinary sectors; the other types of grouping are traditional, digital, private, and public sectors . Explore the primary, secondary, and tertiary sectors of the Indian economy, and understand their contributions to economic growth and development.