Definition of "poisonous" []

  • Capable of harming or killing by or as if by poison; toxic or venomous. (adjective)
  • Containing a poison. (adjective)
  • Marked by apparent ill will: "poisonous hate . . . in his eyes” ( Ernest Hemingway). (adjective)
  • Having the effects or qualities of a poison (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

  • Capable of killing or inflicting injury; venomous (adjective)
  • Corruptive or malicious (adjective) (c) HarperCollins Publishers Ltd 2016

Use "poisonous" in a sentence
  • ""To my thinking such teaching is not only erroneous, it is positively poisonous -- yes, _poisonous_!""
  • "Churkin, angrily denied what he called poisonous, unsourced reports on the Internet aimed at subverting Russia's relationship with Arab countries in the aftermath of the Security Council veto."
  • "I noticed something in the video that I've also noted elsewhere: When describing the scorpion the Japanese commentator uses the English word "poisonous"."