Definition of noxious in English:



  • Harmful, poisonous, or very unpleasant.

    ‘they were overcome by the noxious fumes’
    • ‘The courts have experienced problems over the definition of poison or other noxious thing.’
    • ‘Burning glue sent noxious fumes into the night sky in Brentford this week, after a factory caught fire near the Great West Road.’
    • ‘Residents quite rightly complain of flies, noxious odours, dust, seagulls and noise pollution from the site.’
    • ‘Luckily I smelled the noxious fumes, ran upstairs and managed to extinguish it.’
    • ‘His continued presence in government taints it with the noxious smell of cronyism.’
    • ‘The closer I got to her room, the stronger I could smell the noxious fumes.’
    • ‘It can remove toxic and noxious gases from sewers and clean the air of vaults and tanks.’
    • ‘The residents say that even in fine and warm weather they also have to endure the noxious smell of sewage from their drains.’
    • ‘The noxious fumes are believed to have been caused by a sulphuric acid-based cleaning agent.’
    • ‘They fill the air with noxious fumes, besides causing sound pollution.’
    • ‘In the past, I used to believe that in a democracy these people should be free to foul the airwaves with their noxious opinions.’
    • ‘By vigorously churning the tank every day, she helps the noxious mixture rot and produce the methane that heats her tea.’
    • ‘More to the point, it involves copious amounts of rubber cement and other noxious solvents.’
    • ‘Narcissism is a noxious mental disease that leads people to grandiose delusions.’
    • ‘It's an artificial fragrance used in an attempt to cover up the noxious smell of pesticides.’
    • ‘It is not necessary to prove damage to health from noxious emissions in order to establish a nuisance.’
    • ‘What's less well understood is how noxious such projects are for the cities that surround them.’
    • ‘There is also a specific obligation to prevent the emission of noxious or offensive substances into the atmosphere.’
    • ‘Visitors have to contend with toxic gases, noxious fumes, and showers of hot ash.’
    • ‘If the fox population is to be controlled, (as it must be) fox hunting is no more noxious than other means of doing this.’
    poisonous, toxic, deadly, virulent
    harmful, dangerous, pernicious, damaging, destructive, environmentally unfriendly
    very unpleasant, nasty, disgusting, awful, dreadful, horrible, terrible, vile, revolting, foul, sickening, nauseating, nauseous, appalling, offensive, foul-smelling, evil-smelling, malodorous, fetid, putrid, rancid, unwholesome, unhealthy, insalubrious
    ghastly, horrid
    noisome, mephitic
    miasmal, miasmic, nocuous, olid
    View synonyms


Late 15th century: from Latin noxius (from noxa harm) + -ous.