1. Hurtful; harmful; baneful; pernicious; injurious; destructive; unwholesome; insalubrious; as, noxious air, food, or climate; pernicious; corrupting to morals; as, noxious practices or examples. Too frequent an appearance in places of public resort is noxious to spiritual promotions. (swift)
Origin: L. Noxius, fr. Noxa harm; akin to nocere to harm, hurt. Cf. Nuisance, Necromancy.