Definition of sector in English:


Syllabification: sec·tor
Pronunciation: /ˈsektər


  • 1An area or portion that is distinct from others.
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    • The belt of southern sectors from Sectors 31 to 49 and Sectors 20, 21, 22 and 23 were affected.
    • Illegal rooms have been constructed by city residents on open terraces of the existing block of flats in the entire belt of the southern sectors.
    • Combined they account for a huge portion of the beef sector which overall makes up about 90% of meat output in the Irish market.
  • 1.1A distinct part or branch of a nation’s economy or society or of a sphere of activity such as education: the industrial and commercial sector the business sector of the city
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    • As a result, the private education services sector is growing at around 30 percent per annum.
    • They also protested against government plans to privatise the public health sector.
    • Not that the financial services sector had been slow in its technology uptake.
  • 1.2 Military A subdivision of an area for military operations.
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    • The First Battalion of the Black Watch is based in the British sector of southern Iraq, near Basra.
    • Smith described the fighting in the southern sector as heavy with ‘lots of casualties’ among al-Qaida forces.
    • This flight concentrated on the role usually played by the helicopter over the southern sector in response to naval tasking.
  • 1.3 Computing A subdivision of a track on a magnetic disk.
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    • With the appropriate tools, you can create diskettes that have 80 sectors and 24 tracks per sector, giving 1,920KB per floppy.
    • The search is complete: the hard disk knows what sector, on what track, on what platter the data resides.
    • In other words, you do not have to worry about the cylinder, track or sector configuration of the disk drives.
  • 2The plane figure enclosed by two radii of a circle or ellipse and the arc between them.
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    • For example, Figure 4a shows three such rings formed from the sectors and rectangle in Figure 3a.
    • The protein molecules are modeled as 120 deg sectors of a circle.
    • Each group was made up of units designated by letters, which were then assigned appropriate sectors on circles of different sizes.
  • 3A mathematical instrument consisting of two arms hinged at one end and marked with sines, tangents, etc., for making diagrams.
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    • He also learned on his own how to use a compass, sector, and other instruments to make astronomical predictions, including that of eclipses.



More example sentences
  • Some governments incorporate regional and sectoral variations in their unemployment policies.
  • Local and sectoral depressions and the fall in equity prices initiate doubts as to whether a new era really has been achieved.
  • Regional and sectoral disparities create a complex forward dynamic for the Chinese labor market.


late 16th century (in sense 2 and sense 3): from late Latin, a technical use of Latin sector 'cutter', from sect- 'cut off', from the verb secare.

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