all at once

The idiom "all at once" is used to describe events that happen either simultaneously or suddenly.

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Definition

B2General

(informal)Occurring or done at the same time.

Example

  • The kids shouted 'Surprise!' all at once.
  • The lights in the building went out all at once.

B2General

(informal)Happening suddenly and without warning.

Example

  • All at once, the storm hit.
  • He started laughing all at once.

Similar

Terms that have similar or relatively close meanings to "all at once":

at onceat one timeat one strokeat a timeat oneall togetherall as oneat the same timeen masseone after anotherat one blastin oneall insingle timeright awayall in allall of