careless; thoughtless; unmindful: Heedless of the danger, he returned to the burning building to save his dog.

Origin of heedless

First recorded in 1570–80; heed + -less
Related formsheed·less·ly, adverbheed·less·ness, noun

Synonyms for heedless

Antonyms for heedless

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for heedless

Contemporary Examples of heedless

Historical Examples of heedless

  • The two men bent to the task, heedless of Mary's frantic protest.

    Within the Law

    Marvin Dana

  • She was heedless of the familiar scene, the figures grouped about her.

  • They staggered and trembled in every shaking limb, heedless now of the Earthmen.

    Slaves of Mercury

    Nat Schachner

  • Imogen was not heedless and indiscreet; she would not have sacrificed the dignity of innocence.


    William Godwin

  • One moment of heedless inconsideration may plunge thee in years of calamity.


    William Godwin

British Dictionary definitions for heedless



taking little or no notice; careless or thoughtless
Derived Formsheedlessly, adverbheedlessness, noun
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 heedless

"without regard," 1570s, from heed + -less. Related: Heedlessly; heedlessness.

Online Etymology Dictionary, © 2010 Douglas Harper