What does 曾经 (céngjīng) mean in English?

Card 12NPCR Level 5612/108
CARD12
PROGRESS11%
曾经
曾經
céngjīng
at one time; ever; once(Adverb)

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d