dangerous, hazardous, precarious, perilous, risky mean bringing or involving the chance of loss or injury. dangerous applies to something that may cause harm or loss unless dealt with carefully.

DANGEROUS definition: 1. A dangerous person, animal, thing, or activity could harm you: 2. A dangerous person, animal…. Learn more.

Dangerous definition: full of danger danger or risk; causing danger; danger; perilous; risky; hazardous; unsafe.. See examples of DANGEROUS used in a sentence.

Definition of dangerous adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. something that may cause harm or injury.

Master the word "DANGEROUS" in English: definitions, translations, synonyms, pronunciations, examples, and grammar insights - all in one complete resource.

dangerous meaning, definition, what is dangerous: able or likely to harm or kill you: Learn more.

dan•ger•ous•ly, adv. WordReference Random House Unabridged Dictionary of American English © 2025 dan•ger•ous (dān′ jər əs, dānj′ rəs), adj. full of danger or risk; causing danger; perilous; …

There are eight meanings listed in OED's entry for the adjective dangerous, six of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Definition of dangerous. English dictionary and integrated thesaurus for learners, writers, teachers, and students with advanced, intermediate, and beginner levels.