careless
Americanadjective
-
not paying enough attention to what one does.
a careless typist.
- Synonyms:
- reckless, indiscreet, unwary, incautious, inattentive
- Antonyms:
- careful
-
not exact, accurate, or thorough.
careless work.
- Synonyms:
- negligent, inaccurate
- Antonyms:
- careful
-
done or said heedlessly or negligently; unconsidered.
a careless remark.
- Synonyms:
- unmindful, unthoughtful
- Antonyms:
- careful
-
not caring or troubling; having no care or concern; unconcerned (usually followed by of, about, orin ).
careless of the rights of others;
careless about one's behavior;
careless in speech.
- Synonyms:
- inconsiderate, forgetful, thoughtless
- Antonyms:
- careful
-
possessed or caused without effort or art; unstudied.
careless beauty.
-
Archaic. free from anxiety.
adjective
-
done with or acting with insufficient attention; negligent
-
unconcerned in attitude or action; heedless; indifferent (to)
she's very careless about her clothes
-
(usually prenominal) carefree
-
(usually prenominal) unstudied; artless
an impression of careless elegance
Other Word Forms
Etymology
Origin of careless
First recorded before 1000; Middle English; Old English carlēas; see care, -less
Explanation
When you're careless about something, you're not giving it much attention or consideration. If you're careless about mowing the lawn, you might mow over your mother's prized daffodils without even noticing. When you say, "I couldn't care less" about something, you're probably going to be pretty careless about it, too. If you couldn’t care less about your homework, then you'll approach it in a careless manner, without much thought or concentration. Careless is negative, but it’s a little less so when it means effortless and unstudied, the way you might bat away a bug with a careless swat. Interestingly, the root meaning of care is "grief," so careless is "without grief."
Vocabulary lists containing careless
Power Suffix: -less
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Florida's B.E.S.T. Common Suffixes: -less
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-less
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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.
Proceedings, however, were halted, before he admitted causing death by careless or inconsiderate driving in February.
From BBC • Apr. 18, 2026
When a nameless secretary drops a sheaf of papers, Kornev’s response to help is instinctive, yet we cringe at the careless faux pas he commits in this unfeeling society.
From Los Angeles Times • Mar. 26, 2026
Causing death by careless or inconsiderate driving carries a maximum sentence of five years, while causing death by driving while uninsured carries a maximum term of two years, according to the Sentencing Council.
From BBC • Mar. 8, 2026
In her closing remarks, Halem’s attorney Megan Maitia blasted the LAPD’s Robbery-Homicide Division and the district attorney’s office for what she called a “lazy, careless investigation.”
From Los Angeles Times • Mar. 2, 2026
Lately he had become careless in his shaving.
From "Out of Darkness" by Ashley Hope Pérez
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.
