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Definitions of heartbeat
  1. noun
    a very short time (as the time it takes the eye to blink or the heart to beat)
  2. noun
    the rhythmic contraction and expansion of the arteries with each beat of the heart

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  3. noun
    an animating or vital unifying force
    "New York is the commercial heartbeat of America"
    type of:
Antonyms of heartbeat
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