Definition of 'heartbeat'
- the rhythmic contraction and expansion of the arteries with each beat of the heart; "he could feel the beat of her heart"
Synonyms: pulse pulsation beat
- a very short time (as the time it takes the eye blink or the heart to beat); "if I had the chance I'd do it in a flash"
Synonyms: blink of an eye flash instant jiffy split second trice twinkling wink New York minute
- an animating or vital unifying force; "New York is the commercial heartbeat of America"