Pronunciation: (ven'u-mus),[key] —adj. 1. (of an animal) having a gland or glands for secreting venom; able to inflict a poisoned bite, sting, or wound: a venomous snake. 2. full of or containing venom; poisonous: a venomous wound; a venomous potion. 3. spiteful; malignant: a venomous attack; a venomous tongue.