Dictionary.com

dangerous

[ deyn-jer-uhs, deynj-ruhs ]
/ ˈdeɪn dʒər əs, ˈdeɪndʒ rəs /
See synonyms for: dangerous / dangerously on Thesaurus.com

adjective

full of danger or risk; causing danger; perilous; risky; hazardous; unsafe.
able or likely to cause physical injury: a dangerous criminal.

QUIZZES

THIS PSAT VOCABULARY QUIZ IS PERFECT PRACTICE FOR THE REAL TEST

In our third teacher-created PSAT practice test there are new and unique vocabulary terms you may have never heard of! Can you guess what they mean?
Question 1 of 10
seclusion
a false belief or opinion.
the matter that settles to the bottom of a liquid.
the state of being isolated, kept apart, or withdrawn into solitude.
TAKE THE QUIZ TO FIND OUT

Origin of dangerous

1175–1225; Middle English da(u)ngerous domineering, fraught with danger <Old French dangereus threatening, difficult, equivalent to dangier (see danger) + -eus-ous

OTHER WORDS FROM dangerous

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Words related to dangerous

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

British Dictionary definitions for dangerous

dangerous
/ (ˈdeɪndʒərəs) /

adjective

causing danger; perilous

Derived forms of dangerous

dangerously, adverbdangerousness, noun
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

Idioms and Phrases with dangerous

dangerous

see little knowledge is a dangerous thing; live dangerously.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.