Dictionary.com
definitions
  • synonyms

unthinking

[uhn-thing-king]
See more synonyms for unthinking on Thesaurus.com
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; unmindful: chores done in an unthinking manner.
Show More

Origin of unthinking

First recorded in 1670–80; un-1 + thinking
Related formsun·think·ing·ly, adverbun·think·ing·ness, noun

unthink

[uhn-thingk]
verb (used without object), un·thought, un·think·ing.
  1. to end one's thought or reverse the process of thought.
Show More
verb (used with object), un·thought, un·think·ing.
  1. to dispel from the mind: Unthink your thoughts.
Show More

Origin of unthink

First recorded in 1590–1600; un-2 + think1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unthinking

Contemporary Examples

Historical Examples


British Dictionary definitions for unthinking

unthinking

adjective
  1. lacking thoughtfulness; inconsiderate
  2. heedless; inadvertentit was done in an unthinking moment
  3. not thinking or able to think
Show More
Derived Formsunthinkingly, adverbunthinkingness, noun

unthink

verb -thinks, -thinking or -thought (tr)
  1. to reverse one's opinion about
  2. to dispel from the mind
Show More
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unthinking

adj.

"unreflecting," 1670s, from un- + present participle of think.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper