Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “dangerous”


adjective     /ˈdeɪn.dʒər.əs/ US  /-dʒɚ-/
A2 describes a person, animal, thing, or activity that could harm you: dangerous chemicals The men are armed and dangerous. I've never played ice hockey - it's far too dangerous. [+ to infinitive] It's dangerous to take more than the recommended dose of tablets.Dangers and threats
(Definition of dangerous adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of dangerous

Definitions of “dangerous” in other dictionaries

Word of the Day

work out

to exercise in order to improve the strength or appearance of your body

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More