Longman Dictionary of Contemporary English homepage

Topic: MEDICINE


heartbeat

noun
     
heart‧beat [uncountable and countable]
1M the action or sound of your heart as it pumps blood through your body
2

be a heartbeat away from something

to be very close to a situation or position
3

in a heartbeat

American English very quickly, without delay:
Things can change in a heartbeat.
4

the heartbeat of something

American English the main origin of activity or excitement in a place or organization
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