adj
noxious
NOK-shuhs
adj
1
Harmful or poisonous, especially to health.
"The factory released noxious fumes into the air."
"Wear a mask to avoid breathing in the noxious gas."
How to Use Noxious
Learner’s notesIn plain EnglishSomething toxic or damaging, usually describing fumes, substances, or gases.
Common pairings
noxious fumes
noxious gas
noxious substance
Word Forms
more noxious comparative, most noxious superlative
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The factory released _____ fumes into the air.
Etymology
From Latin noxius, "hurtful," from noxa, "harm."