Word Study
at one time
WORDNET DICTIONARY
Adverbial at one time has 2 senses
- at one time(r = adv.all) at a time, at once - simultaneously; "he took three cookies at a time"
- at one time(r = adv.all) erst, erstwhile, formerly, once - at a previous time; "at one time he loved her"; "her erstwhile writing"; "she was a dancer once"
For further exploring for "at one time" in Webster Dictionary Online