Thesaurus

poisonous

adjective

Synonyms & Antonyms of poisonous

containing or contaminated with a substance capable of injuring or killing a living thing
  • some evil person was leaving out poisonous meat for neighborhood dogs to eat

Synonyms for poisonous

Words Related to poisonous

Near Antonyms for poisonous

Antonyms for poisonous

See the Dictionary Definition 

Keep scrolling for more

Learn More about poisonous

Time Traveler for poisonous

Time Traveler

The first known use of poisonous was in the 15th century

See more words from the same century

Cite this Entry

“Poisonous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/poisonous. Accessed 11 May. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on poisonous

Dictionary: Definition of poisonous

Medical Dictionary: Definition of poisonous

Nglish: Translation of poisonous for Spanish Speakers

Britannica English: Translation of poisonous for Arabic Speakers

Comments on poisonous

What made you want to look up poisonous? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Star Wars Words Quiz

  • cu jedi training
  • The bounty portion of bounty hunters (such as Boba Fett) comes from a Latin word meaning
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!