adjective
Other Word Forms
- dangerously adverb
- dangerousness noun
- nondangerous adjective
- nondangerously adverb
- nondangerousness noun
- quasi-dangerous adjective
- quasi-dangerously adverb
- semidangerous adjective
- semidangerously adverb
- semidangerousness noun
- undangerous adjective
- undangerously adverb
Etymology
Origin of dangerous
First recorded in 1175–1225; Middle English da(u)ngerous “domineering, fraught with danger,” from Old French dangereus “threatening, difficult,” equivalent to dangier ( danger ) + -eus -ous
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.
Pollution is particularly dangerous to those with existing health problems, the elderly and children.
From Barron's • Apr. 3, 2026
But new early research suggests that some of these garments may contain a dangerous substance: lead.
From Science Daily • Apr. 2, 2026
Deported not to their homelands but to unfamiliar cities deep inside Mexico, thousands of migrants are stranded in a dangerous, bureaucratic limbo with little support and no clear path forward.
From Los Angeles Times • Apr. 1, 2026
But Mosley pushed back against suggestions that the speed of his company's platform is rushing decision making at the Pentagon and potentially creating dangerous situations.
From BBC • Apr. 1, 2026
Old Rowdy had made a complete circle around me, and I knew that if the tracks of anything dangerous had crossed the line of that circle, he would have let me know about it.
From "Summer of the Monkeys" by Wilson Rawls
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
