suddenly (rising to fame, etc.); instantly; immediately; overnight
one bound; one leap
若い女優が一躍スターになった。
The young actress overnight became a star.
その動画が拡散されて彼女は一躍時代の寵児となった。
The video spread and she became the darling of the era overnight.
地方の小さな店が一躍全国区に名を馳せた。
A small local shop suddenly became known across the country.