erstwhile, former, old, onetime, one-time, quondam, sometime -- (belonging to some prior time; "erstwhile friend"; "our former glory"; "the once capital of the state"; "her quondam lover")
Overview of adv sometime
The adv sometime has 1 sense
sometime -- (at some indefinite or unstated time; "let's get together sometime"; "everything has to end sometime"; "It was to be printed sometime later")