JMdict: 2208410

あっという間 【あっというま】

  1. [exp,n] an instant; a split second; no time at all; time of an "ah!"
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
Interval, Space カン, ケン あいだ, ま, あい

Words often seen with this one: (experimental feature)

この (12), 本当に (10)