noun, noun, used as a suffix
Refers to a defined stretch of a route, track, line, or similar linear entity. Common in transportation contexts (railway, highway, etc.). Also used as a suffix to specify a particular segment.
この区間は電車がよく遅れる。
Trains are often delayed on this section.
東
The Shinkansen between Tokyo and Osaka is convenient.
noun, noun, used as a suffix
Mathematical use: a set of numbers between two endpoints. Not used for time intervals in everyday language; for that, 間隔 or 時間 is more common.
数学では、区間 [0, 1] を閉区間と呼ぶ。
In mathematics, the interval [0, 1] is called a closed interval.