Pronunciation: (poi'zun),[key] —n. 1. a substance with an inherent property that tends to destroy life or impair health.
2. something harmful or pernicious, as to happiness or well-being: the poison of slander. 3. Slang.any variety of alcoholic liquor: Name your poison!
—v.t. 1. to administer poison to (a person or animal).
2. to kill or injure with or as if with poison.
3. to put poison into or upon; saturate with poison: to poison food. 4. to ruin, vitiate, or corrupt: Hatred had poisoned his mind. 5. Chem.to destroy or diminish the activity of (a catalyst or enzyme).
—adj. causing poisoning; poisonous: a poison shrub.