1
: lacking concern for others : inconsiderate
rude and thoughtless behavior
a thoughtless remark
thoughtlessly
adverb
thoughtlessness
noun
Synonyms
Examples of thoughtless in a Sentence
a selfish and thoughtless person
always making thoughtless comments that hurt other people's feelings
Recent Examples on the Web
Oz’s decision to close that sewer door could be chalked down to a terrible mistake, the thoughtless actions of a child.
—
Dani Di Placido, Forbes, 4 Nov. 2024
The underlying message: Even someone as thoughtless as Larry is incapable of being as cruel as this legislation.
—Jen Chaney, Vulture, 6 Feb. 2024
So maybe use the feelings aroused by your sister-in-law’s thoughtless, certainly injudicious, possibly naughty remark as an opportunity to rise above.
—James Parker, The Atlantic, 22 Oct. 2024
Political disputes have sundered families ‒ some siblings are no longer talking ‒ and heartless or thoughtless social media posts can bring people to tears.
—Trevor Hughes, USA TODAY, 15 Sep. 2024
See all Example Sentences for thoughtless 
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Dani Di Placido, Forbes, 4 Nov. 2024
The underlying message: Even someone as thoughtless as Larry is incapable of being as cruel as this legislation.
—Jen Chaney, Vulture, 6 Feb. 2024
So maybe use the feelings aroused by your sister-in-law’s thoughtless, certainly injudicious, possibly naughty remark as an opportunity to rise above.
—James Parker, The Atlantic, 22 Oct. 2024
Political disputes have sundered families ‒ some siblings are no longer talking ‒ and heartless or thoughtless social media posts can bring people to tears.
—Trevor Hughes, USA TODAY, 15 Sep. 2024
See all Example Sentences for thoughtless
Articles Related to thoughtless
Dictionary Entries Near thoughtless
Cite this Entry
“Thoughtless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thoughtless. Accessed 22 Nov. 2024.
Copy CitationKids Definition
thoughtless
adjective
thought·less
ˈthȯt-ləs 
1
a
: not careful and alert
b
: done without thinking beforehand
thoughtless actions
2
: lacking concern for others : inconsiderate
a thoughtless remark
thoughtlessly
adverb
thoughtlessness
noun
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