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sector

US //ˈsɛktɝ// UK //sˈɛktɐ// sec·tor
  1. 1 geographic zone (n.)
    B2 Upper Intermediate

    a particular area of land or space that is controlled by a certain group.

    a designated area or zone, especially one used for military or administrative purposes.

    Example

    The city was divided into four sectors, each managed by a different team.

    Example

    The peacekeeping forces were assigned to the northern sector to monitor the border and prevent further escalations of the conflict.
  2. 2 geometry (n.)
    C1 Advanced Technical Math

    a part of a circle that looks like a slice of pie.

    the portion of a circle enclosed by two radii and an arc.

    Example

    The teacher asked us to calculate the area of the shaded sector.

    Example

    To determine the total area of the circular garden, we must first calculate the dimensions of each individual sector defined by the walking paths.
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  1. 3 computing (n.)
    C1 Advanced Technical Computing

    a small section on a computer hard drive where data is stored.

    a subdivision of a track on a magnetic disk or optical disc.

    Example

    The computer could not read the file because of a bad sector on the disk.

    Example

    The recovery software attempted to bypass the damaged sectors to retrieve the remaining data from the corrupted hard drive.
  2. 4 aviation (n.)
    C1 Advanced Technical Aviation

    one part of a flight journey, from one airport to the next.

    a single leg of a flight involving one take-off and one landing.

    Example

    The pilot flew three sectors today before finishing her shift.

    Example

    The airline's scheduling software ensures that crew members do not exceed their maximum duty hours across multiple short-haul sectors.
Origin

Borrowed from Latin sector.

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