JMdict: 1164630

一大事 【いちだいじ】

  1. [n] important matter; matter of great importance; serious affair; major incident; emergency
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
One, One Radical (no.1) イチ, イツ ひと-, ひと.つ
Large, Big ダイ, タイ おお-, おお.きい, -おお.いに
Matter, Thing, Fact, Business, Reason, Possibly ジ, ズ こと, つか.う, つか.える