sector
UK: ˈsɛktə | US: ˈsɛktər
n. a distinct part or branch of a society, economy, or area of activity
n. a mathematical term for a portion of a circle enclosed by two radii and an arc
n. a subdivision of a military or organizational unit
The word "sector" originates from Latin sector ("cutter" or "divider"), derived from secare ("to cut"). The root sect- reflects the idea of division or separation, which aligns with its modern meanings—whether dividing a circle mathematically, segmenting economic activities, or organizing military units. The suffix -or typically denotes an agent or instrument, emphasizing the word's functional role in partitioning or categorizing.
The technology sector has seen rapid growth in recent years.
The teacher drew a 90-degree sector on the chalkboard to explain the concept.
The peacekeeping forces were deployed to the northern sector of the conflict zone.
Investors are diversifying their portfolios across multiple economic sectors.
The radar screen displayed aircraft movements in the designated air sector.