heartbeat

noun

heart·​beat ˈhärt-ˌbēt How to pronounce heartbeat (audio)
Synonyms of heartbeatnext
1
: one complete pulsation of the heart
2
: the vital center or driving impulse
3
: a brief space of time : flash
used chiefly in the phrase in a heartbeat

Examples of heartbeat in a Sentence

The patient had a rapid heartbeat. I'd accept a job offer from that company in a heartbeat.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Rather than relying solely on external commands, the system monitors the insect’s heartbeat, neural activity, and body motion to determine its internal state and decide whether stimulation should be applied. Bojan Stojkovski, Interesting Engineering, 30 May 2026 That’s true even if there is still a heartbeat, given the high risk of infection. Kavitha Surana, CNN Money, 28 May 2026 Meetings are the heartbeat of an organization’s culture. Julie Kratz, Forbes.com, 27 May 2026 Doctors and nurses with Doppler machines and ultrasounds kept showing up, forcing them to hear the heartbeat and see the movement of a tiny body. Kavitha Surana, ProPublica, 26 May 2026 See All Example Sentences for heartbeat

Word History

First Known Use

1821, in the meaning defined at sense 1

Time Traveler
The first known use of heartbeat was in 1821

Browse Nearby Words

Cite this Entry

“Heartbeat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heartbeat. Accessed 31 May. 2026.

Kids Definition

heartbeat

noun
heart·​beat ˈhärt-ˌbēt How to pronounce heartbeat (audio)
: a single contracting and expanding of the heart

Medical Definition

heartbeat

noun
heart·​beat ˈhärt-ˌbēt How to pronounce heartbeat (audio)
: one complete pulsation of the heart

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