in a flash

1. 1.

   without any delay

   “he was killed outright”

   Synonymsinstantaneouslyoutrightinstantly

Questions about in a flash

What does in a flash mean?

in a flash means "without any delay".

What is another word for in a flash?

Close synonyms include instantaneously, outright, instantly. 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 in a flash a common word?

in a flash 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.