adj. 25B6; adverb
I'll visit sometime : SOME DAY, one day, one of these (fine) days, at a future date, sooner or later, by and by, in due course, in the fullness of time, in the long run.
it happened sometime on Sunday : AT SOME TIME, at some point; during, in the course of.
never.
25B6; adjective the sometime editor of the paper : FORMER, past, previous, prior, foregoing, late, erstwhile, one-time, ex-; formal quondam.