[ heed-lis ]
See synonyms for: heedlessheedlesslyheedlessness on Thesaurus.com

  1. 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

Other words for heedless

Opposites for heedless

Other words from heedless

  • heed·less·ly, adverb
  • heed·less·ness, noun

Words Nearby heedless

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use heedless in a sentence

  • Princeton students are not heedless of obstacles to combining career and family in the real world.

    Princeton's Woman Problem | Evan Thomas | March 21, 2011 | THE DAILY BEAST
  • He marched on buoyantly, heedless of the wet and the squirting mud from unseen puddles.

  • Because he had sunk into the slough of despond, he would be heedless of the mud that gathered on his garments.

    Julian Home | Dean Frederic W. Farrar
  • The heedless chatter of the ladies, the braying laughs of the men-at-arms, were a little chilled.

    God Wills It! | William Stearns Davis
  • Barrington laughed as he descended the narrow stairs, but he was not heedless of his companion's warnings.

    The Light That Lures | Percy Brebner
  • He wrapped him in every piece of dry clothing he could find, and supported his head, heedless of the blood which covered him.

    Eric, or Little by Little | Frederic W. Farrar

British Dictionary definitions for heedless


/ (ˈhiːdlɪs) /

  1. taking little or no notice; careless or thoughtless

Derived forms of heedless

  • heedlessly, adverb
  • heedlessness, 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