界

日本語

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界

noun ケ · カイ · さかい

（さかい）空間を分ける線。県界
（カイ）種類を同じくする空間。業界 / 政財界 / 音楽界 / 芸能界
（カイ）生物分類の基本階級の一つで、一般的にはその最上単位。但し、近年ではさらにその上位に「ドメイン」をおくこともある。界-門-綱-目-科-（族）-属-（節）-種

In English

kingdom taxonomic division, below Domain and above Phylum
bound mathematics: value greater (or smaller) than a given set
field physics: region affected by a particular force

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MLA

"界." Wiktionary, via Micwyn, micwyn.com/word/ja/%E7%95%8C. Accessed 6 Nov. 2026.

APA

界. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/ja/%E7%95%8C

Chicago

"界." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/ja/%E7%95%8C.

BibTeX

@misc{micwyn_2026,
  title = {界},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/ja/%E7%95%8C},
  urldate = {2026-11-06}
}