unthinking

adjective

un·​think·​ing ˌən-ˈthiŋ-kiŋ 

1

: not taking thought : heedless, unmindful

the unthinking onlookers

2

: not indicating thought or reflection

an unthinking decision

3

: not having the power of thought

unthinkingly

ˌən-ˈthiŋ-kiŋ-lē 

adverb

Examples of unthinking in a Sentence

His unthinking agreement made me uneasy.

Recent Examples on the Web

But Russians are also considered by their leaders as an unthinking mass that must blindly follow their leader. —Andrei Kolesnikov, Foreign Affairs, 18 Apr. 2022

There’s the interest in Britney Spears and pop icons who had been assumed to be vacant, unthinking ingénues. —Brandon Tensley, CNN, 23 Dec. 2022

The point is made: Pinocchio might have a hole where his heart should be, but is the unthinking servile person any less hollow? —Michael Cavna, Washington Post, 8 Dec. 2022

For tens of millions of Americans, COVID-19 disrupted an important and largely unthinking habit: going to their place of work. —Roger Martin, Fortune, 7 July 2022

Word History

First Known Use

1676, in the meaning defined at sense 1

Kids Definition

unthinking

adjective

un·​think·​ing ˌən-ˈthiŋ-kiŋ 

ˈən-

1

: not thinking : inattentive, thoughtless

unthinking people who litter the streets

2

: not having the power of thought

unthinkingly adverb