What does at once mean?
The meaning of at once .
1. at once [adverb]
Definition : without delay or hesitation
with no time intervening
Synonym : directly, forthwith, immediately, instantly, like a shot, now, right away, straight off, straightaway
He answered immediately.
Found an answer straightaway.
An official accused of dishonesty should be suspended forthwith.
Come here now!.
2. at once [adverb]
Definition : simultaneously
Synonym : at a time, at one time
He took three cookies at a time.
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