from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Harmful to living things; injurious to health: noxious chemical wastes.
- adj. Harmful to the mind or morals; corrupting: noxious ideas.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Harmful; injurious.
from the GNU version of the Collaborative International Dictionary of English
- adj. Hurtful; harmful; baneful; pernicious; injurious; destructive; unwholesome; insalubrious; ; pernicious; corrupting to morals.
- adj. Guilty; criminal.
from The Century Dictionary and Cyclopedia
- Hurtful; harmful; baneful; pernicious: as, noxious vapors; noxious animals.
- Guilty; criminal.
- Synonyms Noxious, Pernicious, Noisome, pestiferous, pestilent, poisonous, mischievous, corrupting. That which is noxious is actively and energetically harmful. That which is pernicious is as actively destructive. Noisome and noxious were once essentially the same (see Job xxxi. 40, margin; Ps. xci. 3; Ezek. xiv. 21), but noisome now snggests primarily foulness of odor, with a secondary noxiousness to health. Unwholesome vapors that do not offend the sense of smell would now hardly be called noisome.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. injurious to physical or mental health
Middle English noxius, from Latin, from noxa, damage; see nek-1 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From noxius ("hurtful, injurious"), from noxa ("hurt, injury"), for *nocsa, from nocere ("to hurt, injure"); see nocent. (Wiktionary)