いったん once N2 #9,357 Also a form of 一端 いったん one end 一反 いったん one-tenth hectare 一箪 いったん bamboo utensil (for holding food) Meanings also 一旦 adverb, usually in kana once usually in kana for a short time; briefly; temporarily noun, archaic one morning In sentences Furigana 何なんていったんですか。 I didn't hear what you said. #187853 いったん結婚けっこんしたらおしまいだよ。 Once you are married, you are done for. #228877