Meaning of the word "at one time" in English

What does "at one time" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

at one time

US /æt wʌn taɪm/
UK /æt wʌn taɪm/

Phrase

1.

in the past; formerly

Example:
At one time, this area was covered by a vast forest.
She was a famous actress at one time.
2.

simultaneously; all at once

Example:
You can't do everything at one time.
The children all started talking at one time.