ONCE


Meaning of ONCE in English

adv at some one period of time;

— used indefinitely.

2. once ·adv by limitation to the number one; for one time; not twice nor any number of times more than one.

3. once ·adv at any one time;

— often nearly equivalent to ever, if ever, or whenever; as, once kindled, it may not be quenched.

Webster English vocab.      Английский словарь Webster.