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sector JUST WRITTEN FOR YOU

/ˈsɛk.təɹ/ · sec·tor
noun
  1. A distinct part or subdivision of a larger area, especially one defined for administrative or functional purposes. The city is divided into several sectors, each with its own council.
  2. A designated zone within a larger space, often used in planning, economics, or industry. The tech sector has seen rapid growth over the past decade.
  3. A portion of a circle bounded by two radii and the arc between them. The pizza was cut into eight equal sectors.
Did you know? The word 'sector' entered English in the 17th century, originally describing a geometric slice, and later became a key term in economics to categorize parts of the economy such as the primary, secondary, and tertiary sectors.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Jul 16, 2026