Meaning of heartbeat

Definition of heartbeat

(noun) the rhythmic contraction and expansion of the arteries with each beat of the heart; "he could feel the beat of her heart"
a very short time (as the time it takes the eye to blink or the heart to beat); "if I had the chance I'd do it in a flash"
an animating or vital unifying force; "New York is the commercial heartbeat of America"

Other information on heartbeat

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