- The definition of a poison is a substance that destroys, makes sick or kills, or anything that is harmful to happiness.
- An example of a poison is cyanide.
- An example of a poison is a negative attitude that destroys a positive environment.
- Poison is defined as to give or put in a substance that destroys, makes sick or kills, or to corrupt a mind.
- An example of poison is to pour lethal drugs into food.
- An example of poison is to tell a child that they will never amount to anything; to poison the child's mind.
- a substance causing illness or death when eaten, drunk, or absorbed even in relatively small quantities
- anything harmful or destructive to happiness or welfare, such as an idea, emotion, etc.
- in a nuclear reactor, a substance, as boron, that readily absorbs thermal neutrons from a chain reaction, thereby decreasing the reactivity of a reactor core: it is used for safety or control
- Chem. a substance that inhibits or destroys the activity of a catalyst, enzyme, etc. or that interferes with or checks a reaction
Origin of poisonOld French ; from Classical Latin potio, potion
- to give poison to; harm or destroy by means of poison
- to put poison on or into
- to influence wrongfully; corrupt: to poison someone's mind
- A substance that causes injury, illness, or death, especially by chemical means.
- Something destructive or fatal.
- Chemistry A substance that inhibits another substance or a reaction: a catalyst poison.
transitive verbpoi·soned, poi·son·ing, poi·sons
- To kill or harm with poison.
- To put poison on or into: poisoning arrows; poisoned the drink.
- a. To pollute: Noxious fumes poison the air. See Synonyms at contaminate.b. To have a harmful influence on; corrupt: Jealousy poisoned their friendship.
- Chemistry & Physics To inhibit (a substance or reaction).
Origin of poisonMiddle English, from Old French, from Latin pōtiō, pōtiōn-, drink; see pō(i)- in Indo-European roots.
(third-person singular simple present poisons, present participle poisoning, simple past and past participle poisoned)
- To use poison to kill or paralyse somebody
- The assassin poisoned the king.
- To pollute; to cause some part of the environment to become poisonous
- That factory is poisoning the river.
- To cause something to become much worse
- Suspicion will poison their relationship.
- He poisoned the mood in the room with his non-stop criticism.
- To cause someone to hate or to have unfair negative opinions
- She's poisoned him against all his old friends.