[ poi-zuhn ]
/ ˈpɔɪ zən /


verb (used with object)


causing poisoning; poisonous: a poison shrub.

Origin of poison

First recorded in 1200–50; Middle English puisun, from Old French, from Latin pōtiōn- (stem of pōtiō) “drink, potion, poisonous draught.” See potion.

synonym study for poison

1. Poison, toxin, venom are terms for any substance that injures the health or destroys life when absorbed into the system, especially of a higher animal. Poison is the general word: a poison for insects. A toxin is a poison produced by an organism; it is especially used in medicine in reference to disease-causing bacterial secretions: A toxin produces diphtheria. Venom is especially used of the poisons secreted by certain animals, usually injected by bite or sting: the venom of a snake.


Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for poison

British Dictionary definitions for poison

/ (ˈpɔɪzən) /


verb (tr)

Derived forms of poison

poisoner, noun

Word Origin for poison

C13: from Old French puison potion, from Latin pōtiō a drink, esp a poisonous one, from pōtāre to drink
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for poison

[ poizən ]


A substance taken internally or applied externally that is injurious to health or dangerous to life.
A chemical substance that inhibits another substance or a reaction.


To kill or harm with poison.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Idioms and Phrases with poison


The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.