poisonous definition by Webster's New World
capable of injuring or killing by or as by poison; containing, or having the effects of, a poison; toxic; venomous
poisonous definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- Capable of harming or killing by or as if by poison; toxic or venomous.
- Containing a poison.
- Marked by apparent ill will: “poisonous hate . . . in his eyes” (Ernest Hemingway).
- poiˈson·ous·ly adverb
- poiˈson·ous·ness noun
poisonous - Medical Definition
Relating to or caused by a poison.