venomous

adjective

ven·​om·​ous ˈve-nə-məs 

1

: producing venom in a specialized gland and capable of inflicting injury or death

venomous snakes

2

: full of venom: such as

a

: poisonous, envenomed

b

: noxious, pernicious

… expose a venomous dope ring …

—Don Porter

c

: spiteful, malevolent

venomous criticism

venomously adverb

venomousness noun

Synonyms of venomous

• poisonous
• poisoned
• poison

Examples of venomous in a Sentence

The cobra is a venomous snake.

a venomous attack on his character

Recent Examples on the Web

The sudden appearance of a venomous pit viper named Gary De’Snake (Ke Huy Quan) sends the partners on a dangerous mission to find out why reptiles are outsiders in Zootopia and how Gary is connected to an old journal that contains the patent for the weather walls that create the city’s ecosystem. —Brian Truitt, USA Today, 25 Nov. 2025

On the debate stage, Sliwa’s most venomous attacks were reserved for Cuomo. —Richard Hall, Time, 16 Nov. 2025

For a lower-stakes, breezier project, try a camellias-lilacs-and-sunflower wooden bouquet ($40) or a faintly Lovecraftian punch-out assembly kit for a venomous blue-ringed octopus ($40). —Jessica Winter, New Yorker, 15 Nov. 2025

Students from Tohoku University have discovered a brand-new species of the venomous Portuguese man-of-war. —Pranjal Malewar, New Atlas, 13 Nov. 2025

Word History

Etymology

Middle English venimous, borrowed from Anglo-French venimus, venimous, from venim venom entry 1 + -us, -ous -ous

First Known Use

14th century, in the meaning defined at sense 2

Kids Definition

venomous

adjective

ven·​om·​ous ˈven-ə-məs 

: having or producing venom

venomous snakes

venomously adverb

Medical Definition

venomous

adjective

ven·​om·​ous ˈven-ə-məs 

1

: poisonous

2

: producing venom in a specialized gland and capable of inflicting injury or death

the vipers, pit vipers, and coral snakes are venomous