poison

From Middle English poisoun, poyson, poysone, puyson, puisun, from Old French poison, poison, from Latin pōtio, pōtiōnis (“drink, a draught, a poisonous draught, a potion”), from pōtō (“I drink”). See also potion and potable.

Displaced native Old English ātor.

• enPR: poi'zən, IPA^(key): /ˈpɔɪz(ə)n/

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• Rhymes: -ɔɪzən
• Hyphenation: poi‧son

poison (countable and uncountable, plural poisons)

1. A substance that is harmful or lethal to a living organism when ingested.

   We used a poison to kill the weeds.

2. Something that harms a person or thing.

   Gossip is a malicious poison.

   • 1593, anonymous, The Life and Death of Iacke Straw […], Act IV:

     Awaie with the Rebels ſuffer them not to ſpeake,
     His words are poyſon in the eares of the people, […]

3. (informal) An intoxicating drink; a liquor. (note: this sense is chiefly encountered in the phrases "name your poison" and "what's your poison ?")

   — What's your poison?

   — I'll have a glass of whisky.

4. (chemistry) Any substance that inhibits catalytic activity.
   • 2013, Huazhang Liu, Ammonia Synthesis Catalysts: Innovation and Practice, page 693:

     The temperature effect of poisons. The influence of poison on the catalyst can be different with the change of reaction conditions.

• Not to be confused with venom

• (substance that is harmful): atter, bane, contaminant, pollutant, toxin

poison (third-person singular simple present poisons, present participle poisoning, simple past and past participle poisoned)

1. (transitive) To use poison to kill or paralyse (somebody).

   The assassin poisoned the king.

2. (transitive) To pollute; to cause to become poisonous.

   That factory is poisoning the river.

3. (transitive) To cause to become much worse.

   Suspicion will poison their relationship.

   He poisoned the mood in the room with his non-stop criticism.

4. (transitive) To cause (someone) to hate or to have unfair negative opinions.

   She's poisoned him against all his old friends.

5. (chemistry) To inhibit the catalytic activity of.
6. (transitive, computing) To place false information into (a cache) as part of an exploit.
   • 2013, Ronald L. Mendell, Investigating Information-based Crimes, page 93:

     In this technique, the hacker poisons the cache to launch malware into Web pages.

• Not to be confused with envenomate

• (to pollute): contaminate, pollute, taint
• (to cause to become worse): corrupt, taint

• Douglas Harper (2001–2023), “poison”, in Online Etymology Dictionary.
• poison in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913

From Old French poison, inherited from Latin pōtiō, pōtiōnem. Doublet of potion, a borrowing.

• IPA^(key): /pwa.zɔ̃/

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poison m (plural poisons)

1. poison

   Poisson sans boisson est poison. ― Fish without drink is poison.

• empoisonner
  • empoisonnement
• poisonneux

• “poison”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

poison

1. Alternative form of poisoun

From Latin pōtiōnem, accusative singular of pōtio.

poison f (oblique plural poisons, nominative singular poison, nominative plural poisons)

1. poison
   • circa 1176, Chrétien de Troyes, Cligès:

     Thessala tranpre sa poison

     Thessala mixed her poison

2. potion

• → Middle English: poisoun
  • English: poison
• French: poison

From French poison. Doublet of poción.

• IPA^(key): /ˈpoison/, [ˈpoi̯.sõn]
• Rhymes: -oison
• Hyphenation: poi‧son

poison m (plural póisones)

1. (Louisiana) poison