三さん千ぜん大だい千せん世せ界かいさんぜんだいせんせかいMeanings1nounthe whole universe (of a billion worlds) that Buddha enlightenedBuddhism›Buddhist cosmological term referring to the vast universe comprising a billion world-systems, as described in scriptures.仏ぶっ典てんでは、三さん千ぜん大だい