Usually means: Unexpectedly, without any prior warning.
Definitions Related words Phrases Mentions
We found 20 dictionaries that define the word all of a sudden:

General (17 matching dictionaries)
  1. all of a sudden: Merriam-Webster
  2. all of a sudden: Oxford Learner's Dictionaries
  3. all of a sudden: Collins English Dictionary
  4. all of a sudden: Vocabulary.com
  5. all of a sudden: Wordnik
  6. all of a sudden: Cambridge Advanced Learner's Dictionary
  7. all of a sudden: Wiktionary
  8. All of a sudden, all of a sudden: Dictionary.com
  9. All of a Sudden (album): Wikipedia, the Free Encyclopedia
  10. all of a sudden: Rhymezone
  11. all of a sudden: MyWord.info
  12. all of a sudden: FreeDictionary.org
  13. all of a sudden: Mnemonic Dictionary
  14. all of a sudden: TheFreeDictionary.com
  15. all of a sudden: Longman Dictionary of Contemporary English

Business (1 matching dictionary)
  1. all of a sudden: Legal dictionary

Miscellaneous (1 matching dictionary)
  1. all of a sudden: Idioms

Slang (1 matching dictionary)
  1. all of a sudden: Urban Dictionary

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Definitions from Wiktionary (all of a sudden)

▸ adverb:  (set phrase, colloquial) Suddenly, quickly, without warning.

Similar:
all at once, suddenly, of a sudden, just like that, suddently, unsuddenly, asudden, in a snap, abruptly, up and, more...

Opposite:
gradually, slowly, steadily, progressively

Phrases:
All of a Sudden I Miss Everyone, get angry all of a sudden, all of a sudden everything makes sense, when all of a sudden, to take control all of a sudden, more...

Adjectives:
immediate, forthright, instant, rather, less, stat, around, not long for this world, momentaneous, further, min

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Similar:
all at once, suddenly, of a sudden, just like that, suddently, unsuddenly, asudden, in a snap, abruptly, up and, more...

Opposite:
gradually, slowly, steadily, progressively

Phrases:
All of a Sudden I Miss Everyone, get angry all of a sudden, all of a sudden everything makes sense, when all of a sudden, to take control all of a sudden, lose it all of a sudden, declare all of a sudden, more...

Adjectives:
immediate, forthright, instant, rather, less, stat, around, not long for this world, momentaneous, further, min



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