[ poi-zuh n ]
/ ˈpɔɪ zən /


verb (used with object)


causing poisoning; poisonous: a poison shrub.

Origin of poison

1200–50; Middle English puisun < Old French < Latin pōtiōn- (stem of pōtiō) drink, potion, poisonous draught


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.
7 contaminate, pollute, taint.

Related forms

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for poisoner

British Dictionary definitions for poisoner


/ (ˈpɔɪzən) /


verb (tr)

Derived Forms

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

Medicine definitions for poisoner


[ 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 poisoner


In addition to the idiom beginning with poison

, also see

  • one man's meat is another man's poison


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