unthinking

American  

[uhn-thing-king] / ʌnˈθɪŋ kɪŋ /

adjective

1. thoughtless; heedless; inconsiderate.

   an unthinking, tactless person.

2. indicating lack of thought or reflection.

   a dull, unthinking expression on his face.

3. not endowed with the faculty of thought.

   unthinking matter.

4. not exercising thought; not given to reflection.

   This book will not profit an unthinking person.

5. not thinking; think; unmindful.

   chores done in an unthinking manner.

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unthinking British  

/ ʌnˈθɪŋkɪŋ /

adjective

1. lacking thoughtfulness; inconsiderate

2. heedless; inadvertent

   it was done in an unthinking moment

3. not thinking or able to think

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Other Word Forms

• unthinkingly adverb
• unthinkingness noun

Etymology

Origin of unthinking

First recorded in 1670–80; un- ¹ + thinking

Example Sentences

Much of this squares with Mencken’s character portrait of the “booboisie,” the unthinking type of American whose numbers seem to have exploded in recent decades, perhaps in interaction with contemporary historical events.

From Salon

He seems like an unthinking product of opportunity.

From The Wall Street Journal

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

From MarketWatch

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

Collecting nickels and dimes from the trades of unthinking investors felt beneath the dignity of a big-time Wall Street bond trader.

From Literature