Did you know?

Click any word in a definition or example to find the entry for that word

warning - definition and synonyms


What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

noun warning pronunciation in British English /ˈwɔː(r)nɪŋ/
Word Forms
  • Facebook
  • Twitter
  1. 1
    [countable/uncountable] an action or statement telling someone of a possible problem or danger
    By law, cigarette packets must carry a health warning.
    warning against: a warning against driving on the icy roads
    warning of: a warning of severe thunderstorms
    advance warning: Investors had little advance warning of the stock market crash.
    without warning: Suddenly, without warning, Mitch turned and hit Jacob in the face.
    1. a.
  2. 2
    [countable] an action or statement telling someone that they will be punished or that something bad will happen if they do something
    This is your last warning – if you’re late again, you’ll lose your job.
    warning to: Police issued a warning to drivers that speed limits will be strictly enforced.



a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

BuzzWord Article

Word of the Day


a stupid person

Open Dictionary


an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

add a word


A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog