all at once

/ɑl æt wəns/
/ɔl æt wəns/
IPA guide

Definitions of all at once
  1. adverb
    all at the same time
    “Let's say `Yes!' all at once”
    synonyms: all together
  2. adverb
    without warning
    “all at once, he started shouting”
    synonyms: all of a sudden
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