Table of Contents POS
HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS
ROGET THESAURUS

WORDNET DICTIONARY

Noun heartbeat has 3 senses

• heartbeat(n = noun.event) beat, pulsation, pulse - the rhythmic contraction and expansion of the arteries with each beat of the heart; "he could feel the beat of her heart"
is a kind of periodic event, recurrent event
has particulars: diastole, systole, pounding, throb, throbbing

• heartbeat(n = noun.time) blink of an eye, flash, instant, jiffy, new york minute, split second, trice, twinkling, wink - 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"
is a kind of bit, minute, mo, moment, second

• heartbeat(n = noun.attribute) Array - an animating or vital unifying force; "New York is the commercial heartbeat of America"
is a kind of force

CIDE DICTIONARY

OXFORD DICTIONARY

THESAURUS

heartbeat

anima, animating force, arrhythmia, atman, bathmism, beat, beating, beating heart, biological clock, biorhythm, blood, breath, breath of life, divine breath, divine spark, drumming, elan vital, essence of life, flutter, force of life, growth force, heart, heartblood, heartthrob, impulse of life, inspiriting force, jiva, jivatma, life breath, life cycle, life essence, life force, life principle, life process, lifeblood, living force, palpitation, pitapat, pitter-patter, pneuma, prana, pulsation, pulse, rat-a-tat, rataplan, rhythm, seat of life, soul, spark of life, spirit, staccato, tempo, throb, throbbing, vis vitae, vis vitalis, vital energy, vital flame, vital fluid, vital force, vital principle, vital spark, vital spirit

ROGET THESAURUS

heartbeat

Life

N life, vitality, viability, animation, vital spark, vital flame, soul, spirit, respiration, wind, breath of life, breath of one's nostrils, oxygen, air, respirator, artificial respirator, heart and lung machine, iron lung, medical devices, lifeblood, Archeus, existence, vivification, vital force, vitalization, revivification, Prometheus, life to come, physiology, biology, animal ecology, nourishment, staff of life, genetics, heredity, inheritance, evolution, natural selection, reproduction (production), microbe, aerobe, anaerobe, facultative anaerobe, obligate aerobe, obligate anaerobe, halophile, methanogen, archaebacteria, microaerophile, animal, vegetable, artificial life, robot, robotics, artificial intelligence, breathing, breathing rate, heartbeat, pulse, temperature, preservation of life, healing (medicine), living, alive, in life, in the flesh, in the land of the living, on this side of the grave, above ground, breathing, quick, animated, animative, lively, all alive and kicking, tenacious of life, full of life, yeasty, vital, vitalic, vivifying, vivified viable, zoetic, Promethean, vivendi causa, atqui vivere militare est, non est vivere sed valere vita.

For further exploring for "heartbeat" in Webster Dictionary Online