DictionarypoisonToxic substance
noun / verb

poison

POY-zun/ˈpɔɪzn/

A substance that can cause illness or death.

The sealed bottle of poison bears a clear danger symbol.

Sealed amber bottle with wordless skull-and-crossbones danger pictogram and sealed vial.
Etymology

Potio could mean an ordinary drink or a poisonous one. The harmful-drink sense became central to poison, which came to name a deadly substance rather than only something drunk.

In context

The Infographics Show3:20
even skin contact with the poison can kill you
Why Getting Naked Can Help You Survive Cyanide Poisoning

More examples

  • Some mushrooms can poison people who eat them.
  • Keep household poisons out of children's reach.
  • The spill poisoned the river and killed several fish.

Forms

poison · poisons · poisoned · poisoning

poisonous adjective — Containing poison or able to cause poisoning.

Similar words

toxin
Specifically a poison produced by a living organism.
venom
Poison an animal delivers through a bite or sting.