Dictionary

hazardous

adjective haz·ard·ous \ˈha-zər-dəs\

: involving risk or danger

Full Definition of HAZARDOUS

1
:  depending on hazard or chance
2
:  involving or exposing one to risk (as of loss or harm) <a hazardous occupation> <disposing of hazardous waste>
haz·ard·ous·ly adverb
haz·ard·ous·ness noun

Examples of HAZARDOUS

  1. It was a hazardous voyage.
  2. These are hazardous chemicals that can cause death if inhaled.

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>.
HAZARDOUSLY Defined for Kids

hazardous

adjective haz·ard·ous \ˈha-zər-dəs\

Definition of HAZARDOUS for Kids

:  dangerous 1 <hazardous chemicals>

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