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开集

kāi jídictionary entry
DEFINITION CC-CEDICT
open set (math.)
Sources & editorial notes

Reference definitions: CC-CEDICT contributors and MDBG, CC BY-SA 4.0. Source release 2026-10-27T01:55:52Z. Imported 2026-10-27. Definition wording and meaning order are retained. Recognized pronunciation references are displayed with tone marks; the original source record is available below.

Source record: cd-5dc11d1bdb6d7066. Source SHA-256: bbc4b27f26bee1a262f4d7939667a040c7857c7fc0200a2fa7a86d3352a09eae.

Original source entry:

開集 开集 [kai1 ji2] /open set (math.)/

Reference definitions and teaching material have separate provenance.

Reference information

The definitions above are from CC-CEDICT. Examples and usage notes are available on selected entries.

Character information

View the individual characters. Their meanings do not necessarily explain the meaning of the whole word.

Other forms in these source records: 開集

  • 开
    kāi

    to open (transitive or intransitive) / (of ships, vehicles, troops etc) to start / to turn on / to put in operation / to operate / to run / to boil / to write out (a prescription, check, invoice etc) / (directional complement) away / off / carat (gold) / abbr. for Kelvin, 開爾文|开尔文[Kāi ěr wén] / abbr. for 開本|开本[kāi běn], book format

  • 集
    jí

    to gather / to collect / collected works / classifier for sections of a TV series etc: episode

Reference definitions from CC-CEDICT.