Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A poison or poisonous agent.
  • adj. Poisonous; toxic.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Capable of causing damage by poisoning
  • n. A toxic or poisonous substance

from the GNU version of the Collaborative International Dictionary of English

  • n. A poisonous agent or drug, as opium; an intoxicant.

from The Century Dictionary and Cyclopedia

  • Having toxic effect; capable of poisoning.
  • n. A poison.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any substance that causes injury or illness or death of a living organism
  • adj. having the qualities or effects of a poison

Etymologies

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