前代未聞

ぜんだいみもん

unheard-of

#10,264

Meanings

  1. noun, takes の, four-character idiom unheard-of; unprecedented; unparalleled in history (unparallelled); record-breaking

Its kanji

In sentences

これは前代未聞ぜんだいみもんだね。 This is unheard of. #9851571