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definition of the word heartbeat

by the Wiktionnary

From heart + beat.

Singular
heartbeat

Plural
heartbeats

heartbeat (plural heartbeats)

  1. A rhythmic pulsation of the heart.
    The policeman felt for a heartbeat in vain
  2. A driving impulse or vital force.
    Music is the heartbeat of the people
  3. A very short space of time; an instant.
    The ambulance arrived in a heartbeat
  4. (computing) A periodic signal generated by hardware or software to indicate normal operation or to synchronize other parts of a system.

Definition from Wiktionary
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