[ sek-ter ]
/ ˈsɛk tər /


verb (used with object)

to divide into sectors.

Origin of sector

1560–70; < Late Latin: sector, Latin: cutter, equivalent to of sec(āre) to cut + -tor -tor
Related formssec·tor·al, adjectivesub·sec·tor, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sectoral

British Dictionary definitions for sectoral


/ (ˈsɛktə) /


a part or subdivision, esp of a society or an economythe private sector
geometry either portion of a circle included between two radii and an arc. Area: 1/2 r ²θ, where r is the radius and θ is the central angle subtended by the arc (in radians)
a measuring instrument consisting of two graduated arms hinged at one end
a part or subdivision of an area of military operations
computing the smallest addressable portion of the track on a magnetic tape, disk, or drum store
Derived Formssectoral, adjective

Word Origin for sector

C16: from Late Latin: sector, from Latin: a cutter, from secāre to cut
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sectoral



1560s, "section of a circle between two radii," from Late Latin sector "section of a circle," in classical Latin "a cutter, one who cuts," from sectus, past participle of secare "to cut" (see section (n.)). Translated Greek tomeus in Latin editions of Archimedes. Meaning "area, division" appeared 1920, generalized from military sense (1916) of "part of a front," based on a circle centered on a headquarters. As a verb from 1884. Related: Sectoral; sectorial.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for sectoral


[ sĕktər ]

The part of a circle bounded by two radii and the arc between them.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.