Definitions

dangerous

[deyn-jer-uhs, deynj-ruhs] / ˈdeɪn dʒər əs, ˈdeɪndʒ rəs /

ADJECTIVE

hazardous, troubling

Synonyms

STRONGEST

alarming bad critical deadly fatal nasty perilous precarious risky serious terrible threatening treacherous ugly unhealthy unsafe unstable

STRONG

no-go

WEAK

breakneck chancy dangersome delicate dynamite exposed formidable hairy heavy hot impending impregnable insecure jeopardous loaded malignant menacing mortal on collision course parlous portentous pressing queasy serpentine shaky speculative thorny ticklish touch-and-go touchy urgent viperous vulnerable wicked

Antonyms

STRONGEST

OK agreeable certain good great happy harmless healthful healthy honest kind nice pleasant pleasing safe secure stable strong sure trivial true unimportant wholesome wonderful

WEAK

careful guarded unhazardous untroubled

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A 73-year-old man has been arrested on suspicion of causing death by dangerous driving and released on bail.

From BBC • Jun. 11, 2026

In his letter, Healey said he was first given full sight of the DIP on Monday, revealing that it "falls well short of what is required for defence and the country at this dangerous time".

From Barron's • Jun. 11, 2026

Here’s the uncomfortable truth about risk: It disappears from view exactly when it’s most dangerous.

From MarketWatch • Jun. 11, 2026

Daniel thinks the public should know; Scanlon says telling the world would be tantamount to unleashing a dangerous virus.

From The Wall Street Journal • Jun. 10, 2026

As long as he concentrated on that little game, he didn’t have to think about the fact that he and Katherine and Chip were about to do something incredibly stupid and probably dangerous as well.

From "Found" by Margaret Peterson Haddix

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