What does all of a sudden mean?

all of a sudden means "without warning". That is the primary sense; the word has 2 in total, listed in full on this page.

What is another word for all of a sudden?

Close synonyms include all at once, suddenly, of a sudden. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is all of a sudden a common word?

all of a sudden is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.

All of a sudden — meaning and 3 synonyms

adverb

2 sensesA word that modifies a verb, adjective or other adverb.

1.
without warning
“all at once, he started shouting”
Synonymsall at once
2.
happening unexpectedly
“suddenly she felt a sharp pain in her side”
Synonymssuddenly of a sudden

Questions about all of a sudden

What does all of a sudden mean?: all of a sudden means "without warning". That is the primary sense; the word has 2 in total, listed in full on this page.
What is another word for all of a sudden?

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all of a sudden

adverb

Questions about all of a sudden