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5 dictionary results for: poisonous
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
poi·son·ous       [poi-zuh-nuhs] Pronunciation Key
–adjective
1.full of or containing poison: poisonous air; a poisonous substance.
2.harmful; destructive: poisonous to animals; poisonous rumors.
3.deeply malicious; malevolent: poisonous efforts.
[Origin: 1565–75; poison + -ous]

—Related forms
poi·son·ous·ly, adverb
poi·son·ous·ness, noun
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
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American Heritage Dictionary - Cite This Source - Share This
poi·son·ous       (poi'zə-nəs)  Pronunciation Key 
adj.  
  1. Capable of harming or killing by or as if by poison; toxic or venomous.
  2. Containing a poison.
  3. Marked by apparent ill will: "poisonous hate . . . in his eyes" (Ernest Hemingway).

poi'son·ous·ly adv., poi'son·ous·ness n.
Synonyms: These adjectives mean having the destructive or fatal effect of a poison: a poisonous snake; a mephitic vapor; a pestilent agitator; pestilential jungle mists; toxic fumes; venomous jealousy; a virulent form of cancer.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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WordNet - Cite This Source - Share This
poisonous

adjective
1. having the qualities or effects of a poison 
2. not safe to eat 
3. marked by deep ill will; deliberately harmful; "poisonous hate"; "venomous criticism"; "vicious gossip" 

WordNet® 3.0, © 2006 by Princeton University.
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American Heritage Stedman's Medical Dictionary - Cite This Source - Share This

poisonous poi·son·ous (poi'zə-nəs)
adj.
Relating to or caused by a poison.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Poisonous

Poi"son*ous\, a. Having the qualities or effects of poison; venomous; baneful; corrupting; noxious. --Shak. -- Poi"son*ous*ly, adv. -- Poi"son*ous*ness, n.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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