heartless
Americanadjective
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unfeeling; unkind; unsympathetic; harsh; cruel.
heartless words; a heartless ruler.
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Archaic. lacking courage or enthusiasm; spiritless; disheartened.
adjective
Other Word Forms
Etymology
Origin of heartless
1300–50; Middle English herteles, Old English heortlēas. See heart, -less
Explanation
Someone who's heartless is inconsiderate and insensitive to other people's feelings. It would be heartless to smash a little kid's carefully carved Jack o' lantern. A heartless person might respond glibly to a friend's sad story about his sick grandmother, or push a hungry cat out the door on a rainy night. If you're heartless, you're cold and uncaring. Another, older meaning of this adjective is "lacking courage," from the Old English heortleas, "dispirited or dejected." The modern meaning was coined by poet Percy Bysshe Shelley in 1816.
Vocabulary lists containing heartless
"The Tragedy of Romeo and Juliet," Vocabulary from Act 1
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"The Clever Old Woman" and "Argument"
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Adventures of Don Quixote
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
What an interesting conclusion, considering her refusal to take accountability for other mistakes, including the show’s heartless depiction of Sullivan’s wounding.
From Salon ● Feb. 20, 2026
The barber chair, the locus of Sweeney’s revenge on the heartless cruelty of a Victorian London that wrecked his life, isn’t the elaborate contraption of other productions.
From Los Angeles Times ● Feb. 3, 2026
The caricature of corporate America is heartless indifference, but Paul Gigot and Rupert Murdoch were there for my family and me.
From The Wall Street Journal ● Oct. 20, 2025
For government officials, being called "heartless" is an occupational hazard.
From BBC ● Sep. 12, 2025
I feel heartless, not texting Morgan—though Anna made it pretty clear that I shouldn’t.
From "Leah on the Offbeat" by Becky Albertalli
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
