ま あっという間 Common word LinksSentence search for あっという間Sentence search for あっというまSentence search for あっと言う間Kanji details for 間Edit in JMdict Expressions (phrases, clauses, etc.), Noun1. an instant; a split second; no time at all; time of an "ah!"See also あっと言う間にOther formsあっと言う間 【あっというま】 Discussions Log in to talk about this word.