Did you know?

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

dangerous - definition and synonyms

 
 
 
Close

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.

Close

Thesaurus

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.

more
adjective dangerous pronunciation in American English /ˈdeɪndʒərəs/
  1. 1
    likely to harm or kill someone, or to damage or destroy something
    a dangerous dog
    a dangerous stretch of road
    Air pollution has reached dangerous levels in some cities.
    highly dangerous: an exciting but highly dangerous sport
    dangerous to: It is not yet known whether these chemicals are dangerous to humans.
    it is dangerous (for someone) to do something: It’s dangerous to walk around here on your own at night.
    Synonyms and related words
  2. 2
    likely to have a bad effect or to cause a problem
    Mr. Ashley is playing a dangerous game, pretending to support warring factions.
    it is dangerous (for someone) to do something: It is extremely dangerous for you to get involved in this.
    a dangerous precedent (=a decision that others will follow and that will cause problems): The firing of Mr. Nolan could set a dangerous precedent.
    Synonyms and related words

JOMO

… a feeling of pleasure you get from spending time doing what you want and not worrying about what other people are doing or saying

BuzzWord Article

Word of the Day

animated

lively or active

Open Dictionary

brain fade

a temporary inability to think clearly or remember information

add a word

Blog

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