noun
unprecedented in history; epoch-making
A yojijukugo used to describe events, achievements, or phenomena that have never occurred before in recorded history. Often found in news, formal writing, and dramatic statements.
これは史上空前の大発見だ。
This is an unprecedented discovery in history.
史上空前の規模でイベントが開催された。
The event was held on an unprecedented scale in history.