ADJ
以前的；从前的；一度的
One-time is used to describe something such as a job, position, or role which someone used to have, or something which happened in the past.
例句
She's 87 years old, and a one-time member of the Ziegfeld Follies...
她现年87岁，曾经是齐格菲尔时事讽刺剧团的成员之一。
The legislative body had voted to oust the country's onetime rulers.
立法机构通过投票将该国的前度领导人赶下了台。