[ wawr-ning ]
See synonyms for warning on Thesaurus.com
  1. the act or utterance of one who warns or the existence, appearance, sound, etc., of a thing that warns.

  2. something that serves to warn, give notice, or caution: We fired a warning at the intruders.

  1. Meteorology. an announcement from the U.S. National Weather Service alerting the public that a storm or other weather-related hazard is imminent and that immediate steps should be taken to protect lives and property.: Compare advisory (def. 5), storm warning (def. 2), watch (def. 20).

  1. serving to warn, advise, caution: a warning bell.

Origin of warning

First recorded before 900; Middle English (noun); Old English war(e)nung “precaution”; see warn, -ing1, -ing2

Other words for warning

Other words from warning

  • warn·ing·ly, adverb

Words Nearby warning

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

How to use warning in a sentence

British Dictionary definitions for warning


/ (ˈwɔːnɪŋ) /

  1. a hint, intimation, threat, etc, of harm or danger

  2. advice to beware or desist

  1. an archaic word for notice (def. 6)

  1. (prenominal) intended or serving to warn: a warning look

  2. (of the coloration of certain distasteful or poisonous animals) having conspicuous markings, which predators recognize and learn to avoid; aposematic

Derived forms of warning

  • warningly, adverb

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