Definition of heartbeat noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈhɑːtbiːt//
    ; NAmE NAmE//ˈhɑːrtbiːt//
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  1. 1[countable, uncountable] the movement or sound of the heart as it sends blood around the body a rapid/regular heartbeat She was suddenly aware of her racing heartbeat. The first track on the album begins with the sound of a heartbeat.
  2. 2[singular] the heartbeat of something (North American English) an important feature of something, that is responsible for making it what it is The candidate said that he understood the heartbeat of the Hispanic community in California.
  3. Idioms
    a heartbeat away (from something)
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    very close to something Her game is just a heartbeat away from perfection.
    very quickly, without thinking about it If I was offered another job, I'd leave in a heartbeat.
See the Oxford Advanced American Dictionary entry: heartbeat