All at once

//ˌɔːl ət ˈwʌn(t)s// adv

Definitions

Adverb
  1. 1
    Unexpectedly; without warning; all of a sudden. idiomatic, not-comparable

    "When all at once I saw a crowd, / A host, of golden daffodils"

  2. 2
    Used other than figuratively or idiomatically: All at the same time; all together. not-comparable

    "There are too many to get in the lift all at once, so some must wait."

Adverb
  1. 1
    suddenly wordnet
  2. 2
    all at the same time wordnet

Next best steps

Mini challenge

Unscramble this word: allatonce