いっしゅん 一瞬にして LinksSentence search for 一瞬にしてSentence search for いっしゅんにしてKanji details for 一 and 瞬Edit in JMdict Expressions (phrases, clauses, etc.), Adverb (fukushi)1. in an instant; instantly; in a moment; instantaneously; in the twinkling of an eye Discussions Log in to talk about this word.