Dictionary.com
Thesaurus.com
Showing results for dangerous. Search instead for dangerous+weapon.
Synonyms

dangerous

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

adjective

  1. full of danger danger or risk; causing danger; danger; perilous; risky; hazardous; unsafe.

  2. able or likely to cause physical injury.

    a dangerous criminal.
dangerous British  
/ ˈdeɪndʒərəs /

adjective

  1. causing danger; perilous

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
dangerous Idioms  

  1. see little knowledge is a dangerous thing; live dangerously.

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

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.