1. 心搏;心跳
Your heartbeat is the regular movement of your heart as it pumps blood around your body.

2. （一次）心搏，心跳
A heartbeat is one of the movements of your heart.

1. an animating or vital unifying force

e.g. New York is the commercial heartbeat of America

2. the rhythmic contraction and expansion of the arteries with each beat of the heart

e.g. he could feel the beat of her heart

Synonym: pulsepulsationbeat

3. a very short time (as the time it takes the eye to blink or the heart to beat)

e.g. if I had the chance I'd do it in a flash

Synonym: blink of an eyeflashinstantjiffysplit secondtricetwinklingwinkNew York minute