Very striking or remarkable; used for outstanding progress, results, or changes.
彼の研究は目覚ましい成果を上げた。
His research produced remarkable results.
目覚ましい経済成長を遂げた都市だ。
It's a city that has achieved spectacular economic growth.
去年に比べて売上が目覚ましく伸びた。
Sales have increased remarkably compared to last year.