Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

hazardous

play
adjective haz·ard·ous \ˈha-zər-dəs\

Simple Definition of hazardous

  • : involving risk or danger

Source: Merriam-Webster's Learner's Dictionary

Full Definition of hazardous

  1. 1 :  depending on hazard or chance

  2. 2 :  involving or exposing one to risk (as of loss or harm) <a hazardous occupation> <disposing of hazardous waste>

hazardously

adverb

hazardousness

noun

Examples of hazardous in a sentence

  1. It was a hazardous voyage.

  2. These are hazardous chemicals that can cause death if inhaled.



1585

First Known Use of hazardous

1585

Synonym Discussion of hazardous

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 <soldiers on a dangerous mission>. hazardous implies great and continuous risk of harm or failure <claims that smoking is hazardous to your health>. precarious suggests both insecurity and uncertainty <earned a precarious living by gambling>. perilous strongly implies the immediacy of danger <perilous mountain roads>. risky often applies to a known and accepted danger <shied away from risky investments>.

HAZARDOUS Defined for Kids

hazardous

play
adjective haz·ard·ous \ˈha-zər-dəs\

Definition of hazardous for Students

  1. :  dangerous 1 <hazardous chemicals>




Law Dictionary

hazardous

adjective haz·ard·ous

Legal Definition of hazardous

  1. :  creating a hazard :  involving or exposing one to risk (as of loss or harm) <a hazardous occupation> <a hazardous substance>

hazardously

adverb




Seen and Heard

What made you want to look up hazardous? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of, relating to, or near a shore

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

torrent interruption rebellion megillah
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ