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Definition of "poison" []

  • A substance that causes injury, illness, or death, especially by chemical means. (noun)
  • Something destructive or fatal. (noun)
  • Chemistry & Physics A substance that inhibits another substance or a reaction: a catalyst poison. (noun)
  • To kill or harm with poison. (verb-transitive)
  • To put poison on or into: poisoning arrows; poisoned the drink. (verb-transitive)

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.

Use "poison" in a sentence
  • "You learn very soon that poison medicines are kept apart from the others, and quickly associate the _poison_ label with danger to patients, necessity of locking safely away and hiding the key from any but those responsible for the care of the sick."
  • "See stäf. âter-teár, m., _poisonous drop_: dat.pl. îren âter-teárum fâh (steel which is dipped in poison or in poisonous sap of plants), 1460. âttor, st. n., _poison_, here of the poison of the dragon's bite: nom.,"
  • "This turned out to be what we call a poison pen, what the intelligence people call a poison pen."