poisonous

[ poi-zuh-nuh s ]
/ ˈpɔɪ zə nəs /

adjective

full of or containing poison: poisonous air; a poisonous substance.
harmful; destructive: poisonous to animals; poisonous rumors.
deeply malicious; malevolent: poisonous efforts.

Origin of poisonous

First recorded in 1565–75; poison + -ous

OTHER WORDS FROM poisonous

Example sentences from the Web for poisonous

British Dictionary definitions for poisonous

poisonous
/ (ˈpɔɪzənəs) /

adjective

having the effects or qualities of a poison
capable of killing or inflicting injury; venomous
corruptive or malicious

Derived forms of poisonous

poisonously, adverb poisonousness, noun

Medical definitions for poisonous

poisonous
[ poizə-nəs ]

adj.

Relating to or caused by a poison.