What does the word sector mean?

Usage examples for sector

  1. This is Bill Hayes, of Sector Administration. – Eight Keys to Eden by Mark Irvin Clifton
  2. What's the Esaron Sector like? – Time Crime by H. Beam Piper
  3. They had come to build an outpost of human beings, to establish man's claim in this sector of the Universe. – The Colonists by Raymond F. Jones