What does 一旦 mean?
一旦 is a Japanese noun meaning “once, for a moment” in English. It can also be translated as “for a short time, one morning” depending on context. It is written as 一旦 in kanji, いったん in hiragana, and ittan in romaji. This word is part of JLPT N2 vocabulary.
Example sentences
いったんしたことは元どおりにならない。
What is done cannot be undone.
いったん着地した怪物は、瞬間ふたたび跳躍して私の頭上にいた。
Having once landed the monster immediately jumped again and was over my head.