from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Marked by danger; perilous.
  • adj. Depending on chance; risky.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Risky, dangerous, with the nature of a hazard.
  • adj. this sense?) Exposing to loss or evil.
  • adj. Of or involving chance.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Exposed to hazard; dangerous; risky.

from The Century Dictionary and Cyclopedia

  • Full of or exposing to hazard or peril, or danger of loss or evil; dangerous; risky.
  • Reckless; daring; inclined to run risks.
  • Synonyms Perilous, unsafe, precarious, uncertain, bold, daring.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. involving risk or danger


Sorry, no etymologies found.


  • The word hazardous has appeared in 326 New York Times articles in the past year, including on Nov. 3 in "The Joys, and Frustrations, of Snow Days in November," by Winnie Hu and Nate Schweber:

    NYT > Home Page

  • See, I c'n compost 'bout ev'thang organic, an 'I can turn them aluminum cans in, but the rest of th' trash I gotta pay for pickup, an 'on a farm, they's a lot of it what they call hazardous, an' thats extra.

    Fiddler Fair

  • Pulsipher says rescuers were able to find the two other men who were stranded on what he calls a hazardous climb.

    Kansas City Star: Front Page

  • Learn more about the word "hazardous" and see usage examples across a range of subjects on the dictionary.

    NYT > Home Page

  • We need to establish a permanent, global moratorium on offshore drilling and have a legally binding mechanism that prohibits companies from engaging in hazardous platform oil and natural gas drilling.

    Bianca Jagger: Now Is the Time to Move Beyond Petroleum

  • Fisher is referring to $180 million in hazardous substance tax revenues that went to help balance the general fund last year (a one time deal from last year that hardly explains why the storm water clean up funds are scarce.)

    Oil Industry: “No Deal.” « PubliCola

  • However, he added: The participation in hazardous activities is much safer than what it was five years ago.

    Extreme Sports Killing the Over 70s | Impact Lab

  • Potential applications include industrial inspection and disaster rescue in hazardous locations.

    Autonomous Indoor Helicopter

  • Do we put this one down as “saved from drowning” or as “found in hazardous situation, fortunately no incident occurred”?

    What Really Matters At The Top « POLICE INSPECTOR BLOG

  • I still have to quibble with the "skilled in hazardous assassinations" part on mine as I'm a lover not a fighter.

    A rose by any other cyborg name…


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  • Good U.! Check the challenge on lather and see what you can come up with...

    October 5, 2007

  • What about annelidous?

    October 5, 2007

  • I'm told that the words hazardous, horrendous, stupendous and tremendous are the only four words that end in 'dous' in the English language. Come on, Wordies, let's prove 'em wrong!

    October 5, 2007