DICTIONARY · CC-CEDICT

閉區間

简闭区间 · 繁閉區間

Mandarin · pinyin bì qū jiān

closed interval (in calculus)

Full entryShow on map

Characters in this entry

閉: Look up this written character
區: Look up this written character
間: Look up this written character
闭: bì · shut, close; obstruct, block up
区: qū · area, district, region, ward
间: jiān · midpoint, space; place, locality

Written characters and their own readings; the entry’s pronunciation is shown above.

Explore the spelling

Mandarin tones

4–1–1 · bi4 qu1 jian1

Compare attested words with these syllables ↗

Dictionary tones. Connected speech can change their realization.

Connected dictionary

3character links

Explore word families ↗Compare pronunciations ↗Open character structure ↗

Counts describe dictionary records, not word frequency or semantic similarity. Source identities stay separate.

Read this spelling in Classical texts

Follow a written form into the eight pinned witnesses: Analects, Mencius, Laozi, Zhuangzi, Xunzi, Han Feizi, Sunzi and the Mao Shijing. A match is a place to investigate; it does not prove that a modern dictionary sense fits the passage.

閉區間 · find source passages ↗ · 闭区间 · find source passages ↗

Explore Classical grammar ↗

Compare dictionary sources Wiktionary · 1 sense

Wiktionary English definitions · Chinese section

Independent source senses for this spelling, with usage labels retained. Not matched to the pronunciation above.

noun

(mathematics) closed interval

Source page · dump 2026-09-02 · Contributors & history

Wiktionary contributors · CC BY-SA 4.0 · source & license · Data pack