thought·​less | \ˈthȯt-ləs \

Definition of thoughtless 

1 : lacking concern for others : inconsiderate rude and thoughtless behavior a thoughtless remark

2a : insufficiently alert : careless

b : reckless, rash thoughtless actions

3 : devoid of thought : insensate

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Other Words from thoughtless

thoughtlessly adverb
thoughtlessness noun

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

Randall isn’t present for that tense exchange between Kate, Toby and Rebecca, but the whole thing is sparked by a thoughtless comment from Kate. Emma Dibdin, Country Living, "6 Moments From 'This Is Us' You Need to Know Before Watching Next Week's Episode," 7 Oct. 2018 The algorithms of social media can be thoughtless in a time of mourning, provoking painful emotions if they aren’t kept in check. Kim Komando, Fox News, "Bitcoin crashing, Netflix offline and more: Tech Q&A," 22 Sep. 2018 When a thoughtless or unkind word is spoken, best tune out. NBC News, "How to dissent like RBG," 10 June 2018 As the New York Times tells it, one prominent company, H&M, is seeking greater diversity as a hedge against thoughtless decisions. David Lazarus,, "California Inc.: Hollywood is courted by a newly moviegoing Saudi Arabia," 2 Apr. 2018 Here was a petty, meritless, underhanded politician undone by a petty, thoughtless, underhanded thing. David Murphy,, "Bryan Colangelo's downfall is stunning, but the Sixers did the right thing | David Murphy," 7 June 2018 Just as in real life, bad behavior by thoughtless people has followed us into the online universe. Dwight Silverman, San Antonio Express-News, "How to be a good internet citizen," 3 July 2018 Hence, the almost weekly public apologies of personalities both famous and faint for crude, rude, thoughtless or worse electronic missives., "A long tradition: Americans behaving badly," 5 July 2018 And what could make this whole situation brighter than a thoughtless response? Lucy Wood, Marie Claire, "Scarlett Johansson Responds to 'Rub & Tug' Criticism With a Tone-Deaf Statement," 4 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thoughtless.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of thoughtless

1544, in the meaning defined at sense 2a

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Last Updated

21 Nov 2018

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Time Traveler for thoughtless

The first known use of thoughtless was in 1544

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More Definitions for thoughtless



English Language Learners Definition of thoughtless

: not showing concern for the needs or feelings of other people


thought·​less | \ˈthȯt-ləs \

Kids Definition of thoughtless

1 : not considerate of others thoughtless behavior

2 : not careful and alert

3 : done without thinking thoughtless actions

Other Words from thoughtless

thoughtlessly adverb
thoughtlessness noun

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More from Merriam-Webster on thoughtless

Thesaurus: All synonyms and antonyms for thoughtless

Spanish Central: Translation of thoughtless

Nglish: Translation of thoughtless for Spanish Speakers

Comments on thoughtless

What made you want to look up thoughtless? Please tell us where you read or heard it (including the quote, if possible).


to make faulty or ineffective

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