Definition of in a heartbeat in English:

in a heartbeat

Instantly; immediately: I’d do it again in a heartbeat
More example sentences
  • Drop-dead gorgeous, she has the amazing ability to go from incredibly sweet to incredibly deadly in a heartbeat.
  • A tornado could take everything I own in a heartbeat.
  • The only reason I even went to work was for money, otherwise I would have quit in a heartbeat.
See parent entry: heartbeat

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Word of the day animalcule
Pronunciation: ˌanɪˈmalkjuːl
noun
a microscopic animal