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Definitions

unthinking

[uhn-thing-king] / ʌnˈθɪŋ kɪŋ /
ADJECTIVE
careless
Synonyms
WEAK
blundering brutish feckless foolish heedless impulsive inadvertent inconsiderate indelicate insensitive instinctive mechanical napping negligent oblivious outrageous rash rude selfish senseless tactless thoughtless uncaring unconscious undiplomatic unheeding unintended unmeant unmindful unpremeditated unreasoning untactful unwise vacant witless
Antonyms
WEAK
careful cautious thoughtful

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.

And that in turn prevents you from aimless or unthinking financial behavior.

From MarketWatch • Dec. 24, 2025

For all its promise, AI risks instilling in students an unthinking yet false understanding of themselves and society, destroying the morals and habits that make human flourishing possible.

From The Wall Street Journal • Dec. 14, 2025

Mr Harvey admitted sending them a letter in April 2017 which he now acknowledged was “crass, inappropriate… unthinking and insensitive”.

From BBC • Nov. 30, 2024

More than 100 million years in the making, it was a kind of unthinking envoy in the early life of you, one that is all too often overlooked.

From Slate • Sep. 7, 2024

He could drive me to a kind of unthinking fury.

From "Kindred" by Octavia Butler

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.