Capable of harming or killing by or as if by poison; toxic or venomous.
Containing a poison.
Marked by apparent ill will: “poisonous hate . . . in his eyes” (Ernest Hemingway)
derivatives
poíson·ous·ly
adverb
poíson·ous·ness
noun
synonyms:
poisonous, mephitic, pestilent, pestilential, toxic, venomous, virulent These adjectives mean having the destructive or fatal effect of a poison: a poisonous snake; a mephitic vapor; a pestilent agitator; pestilential jungle mists; toxic fumes; venomous jealousy; a virulent form of cancer.
The American Heritage® Dictionary of the English Language, Fourth Edition