at one time

at one time

1. Formerly.

   At one time, I could walk ten miles in a day, but I can't any longer.

   • 1951 October, R. S. McNaught, “Lines of Approach”, in Railway Magazine, page 704:

     But despite its plague of tunnels, the run-in on this route is of unusual interest to the locomotive enthusiast: besides the hordes of self-important saddle-tanks shunting in the extensive yards, there was at one time the chance of seeing those slender little North London engines, with their large outside cylinders and no visible storage place for coal, and also an occasional South Eastern locomotive sporting a lot of polished brass.

2. Simultaneously, at once.

   A bigamist has two spouses at one time.

• (formerly): formerly, in the past, previously; see also Thesaurus:formerly
• (simultaneously): at the same time, simultaneously, together; see also Thesaurus:simultaneously

• (antonym(s) of “formerly”): currently, now, nowadays, presently, these days, today; see also Thesaurus:currently or Thesaurus:subsequently
• (antonym(s) of “simultaneously”): individually, one at a time, separately

• one time