Definition of noxious in English:



  • Harmful, poisonous, or very unpleasant.

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