Definition

1. Noun:
   • A single complete pulsation of the heart: The regular, rhythmic contraction and expansion of the heart muscle that pumps blood through the body.
   • A very brief moment of time: An extremely short period, often compared to the time it takes for a single heart pulsation.
   • A vital or animating force; a central driving element: Something that is the essential, life-giving, or unifying core of a system or place.

Examples of Usage

• Noun (Pulsation of the heart):
  • The doctor listened to the baby's steady heartbeat.
  • He could feel the rapid heartbeat in his chest after running.
• Noun (Brief moment):
  • The entire event was over in a heartbeat.
  • I'll be back in a heartbeat.
• Noun (Vital force):
  • The bustling market is the heartbeat of the old city.
  • Innovation is the heartbeat of a successful tech company.

Advanced Usage

• "At a heartbeat" or "in a heartbeat": Used to indicate immediate willingness or an extremely short amount of time.
  • I would accept that job offer in a heartbeat.
• "Miss a heartbeat": To be shocked or surprised.
  • He didn't miss a heartbeat when he heard the surprising news. (Note: More common as "without missing a beat").

Variants and Related Words

• Heart: The organ itself, often used metaphorically as the center of emotion.
• Pulse: The rhythmic beating in the arteries, often felt at the wrist, caused by the heartbeat.
• Cardiac: Relating to the heart.
• Arrhythmia: An irregularity in the rhythm of the heartbeat.

Synonyms

• Pulse: The regular beat of the arteries.
• Throb: A strong, regular beat or pulsation.
• Instant: A very short period of time.
• Core: The central or most important part.
• Lifeblood: The vital element or force that gives something its strength and vitality.

Related Phrases

• Heartbeat away: Used to indicate being very close, often to a position of power.
  • The Vice President is only a heartbeat away from the presidency.

Related Idioms

• In the blink of an eye: Happening very quickly (similar to "in a heartbeat" for time).
• The heart of the matter: The most central or important part of an issue.

Noun

1. an animating or vital unifying force
   • New York is the commercial heartbeat of America
2. a very short time (as the time it takes the eye to blink or the heart to beat)
   • if I had the chance I'd do it in a flash
3. the rhythmic contraction and expansion of the arteries with each beat of the heart
   • he could feel the beat of her heart