sector

B2 · Upper Intermediate Countable noun

n. a specific area that is part of a larger region, often for military or control purposes.

n. a designated area or zone within a larger territory, often used in military, aviation, or administrative contexts.

Español:sector

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

“Air traffic controllers handed over the flight to the next sector as the aircraft crossed the regional boundary.”

C1 · Advanced Countable noun Mathematics Technical

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

n. a plane figure bounded by two radii and the included arc of a circle.

日本語:扇形※

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

“The pie chart was divided into several sectors, with the largest representing nearly half of the total expenditure.”

C2 · Proficiency Countable noun Computing Technical

n. a small section of a computer disk where data is stored.

n. a subdivision of a track on a magnetic disk or optical disc, traditionally holding a fixed amount of data.

“The computer could not read the file because of a bad sector on the hard drive.”

“Low-level formatting defines the physical tracks and sectors on the disk surface before any file system is installed.”