noxious

adjective
nox·​ious | \ˈnäk-shəs \

Definition of noxious 

1a : physically harmful or destructive to living beings noxious waste noxious fumes

b : constituting a harmful influence on mind or behavior especially : morally corrupting noxious doctrines

2 : disagreeable, obnoxious this noxious political scandal— H. L. Ickes

Keep scrolling for more

Other Words from noxious

noxiously adverb
noxiousness noun

Choose the Right Synonym for noxious

pernicious, baneful, noxious, deleterious, detrimental mean exceedingly harmful. pernicious implies irreparable harm done through evil or insidious corrupting or undermining. the claim that pornography has a pernicious effect on society baneful implies injury through poisoning or destroying. the baneful notion that discipline destroys creativity noxious applies to what is both offensive and injurious to the health of a body or mind. noxious chemical fumes deleterious applies to what has an often unsuspected harmful effect. a diet found to have deleterious effects detrimental implies obvious harmfulness to something specified. the detrimental effects of excessive drinking

Examples of noxious in a Sentence

mixing bleach and ammonia can cause noxious fumes that can seriously harm you noxious smog that for years has been encrusting the historic cathedral with soot

Recent Examples on the Web

The heavy rain expected from Hurricane Florence could flood hog manure pits, coal ash dumps and other industrial sites in North Carolina, creating a noxious witches’ brew of waste that might wash into homes and threaten drinking water supplies. Michael Biesecker, Fox News, "Hurricane could flood many waste sites, creating toxic brew," 12 Sep. 2018 The heavy rain expected from Hurricane Florence could flood hog manure pits, coal ash dumps and other industrial sites in North Carolina, creating a noxious witches’ brew of waste that might wash into homes and threaten drinking water supplies. Michael Biesecker, The Seattle Times, "Hurricane could flood many waste sites, creating toxic brew," 11 Sep. 2018 The real trouble began in January 2016, when Twitter removed the badge from the profile of noxious right-wing personality Milo Yiannopoulos. Casey Newton, The Verge, "Instagram’s verification system is useful, fair, and Twitter should copy it," 29 Aug. 2018 Growing as both a shrub and a vine, the innocuous-looking flora produces a noxious sap responsible for the reaction, called allergic contact dermatitis. Caroline Picard, Good Housekeeping, "How to Get Rid of a Poison Ivy Rash and Stop Itching Like Crazy," 13 July 2018 Walking to a store in March, Olga Yevseyeva was hit by the familiar, noxious stench of rotten eggs wafting from the town landfill a few miles away. Washington Post, "A big stink erupts over landfills ringing Russia’s capital," 19 June 2018 When this happens, water boils away, and the resulting reactions produce a noxious plume of steam, hydrochloric acid, and shards of volcanic glass. Maya Wei-haas, Smithsonian, "A Brief Glossary of Volcano Vocab," 25 May 2018 Slightly less noxious but vastly more pervasive, the smell of the brown marmorated stinkbug is often likened to that of cilantro, chiefly because the same chemical is present in both. Steven Strogatz, The New Yorker, "When Twenty-Six Thousand Stinkbugs Invade Your Home," 8 Aug. 2011 Nuisance laws had targeted problems like noxious odors or chemical spills that crept across property lines. Emily Badger, New York Times, "How ‘Not in My Backyard’ Became ‘Not in My Neighborhood’," 3 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'noxious.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of noxious

15th century, in the meaning defined at sense 1a

History and Etymology for noxious

Middle English noxius, from Latin, from noxa harm; akin to Latin nocēre to harm, nec-, nex violent death, Greek nekros dead body

Keep scrolling for more

Learn More about noxious

Dictionary Entries near noxious

noxal

noxal action

noxal surrender

noxious

noyade

noyance

noyau

Statistics for noxious

Last Updated

14 Nov 2018

Look-up Popularity

Time Traveler for noxious

The first known use of noxious was in the 15th century

See more words from the same century

Keep scrolling for more

More Definitions for noxious

noxious

adjective

English Language Learners Definition of noxious

: harmful to living things

noxious

adjective
nox·​ious | \ˈnäk-shəs \

Kids Definition of noxious

: causing harm noxious fumes

noxious

adjective
nox·​ious | \ˈnäk-shəs \

Medical Definition of noxious 

: physically harmful or destructive to living beings noxious wastes

Keep scrolling for more

More from Merriam-Webster on noxious

Thesaurus: All synonyms and antonyms for noxious

Spanish Central: Translation of noxious

Nglish: Translation of noxious for Spanish Speakers

Britannica English: Translation of noxious for Arabic Speakers

Comments on noxious

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

WORD OF THE DAY

a trusted follower

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!