This site will be taken down March 31st, 2026.

This was not an easy decision to make. For the last couple years, I have been struggling to find motivation for this site and to keep up with basic maintenance and security updates. With the rise of AI and more sophisticated tools, the usefulness of sites like this is questionable and traffic has nose-dived. I just don't have it in me to keep doing this. Thank you all for 10 years of support!

Zach

前代未聞

Reading

Kana: ぜんだいみもん
Romaji: zendaimimon
Kana
Romaji

Definition

1

unheard-of; unprecedented; unparalleled in history (unparallelled); record-breaking

Note: yojijukugo

Kanji

Readings: ゼン、 まえ、 -まえ
Meanings: in front, before
Readings: ダイ、 タイ、 か.わる、 かわ.る、 かわ.り、 か.わり、 -がわ.り、 -が.わり、 か.える、 よ、 しろ
Meanings: substitute, change, convert, replace, period, age, counter for decades of ages, eras, etc., generation, charge, rate, fee
Readings: ミ、 ビ、 いま.だ、 ま.だ、 ひつじ
Meanings: un-, not yet, hitherto, still, even now, sign of the ram, 1-3PM, eighth sign of Chinese zodiac
Readings: ブン、 モン、 き.く、 き.こえる
Meanings: hear, ask, listen

Example Sentence

犯人(はんにん)弁護(べんご)してた弁護士(べんごし)(じつ)真犯人(しんはんにん)だったなんて、前代未聞(ぜんだいみもん)だ。
➥It's totally without precedent for the suspect's attorney to be the true culprit.
Full Entry➤