poison
A substance that is harmful or lethal to a living organism when ingested.
Other meanings
Anything harmful to a person or thing.
“Gossip is a malicious poison.”
Any substance that inhibits catalytic activity.
Word history
From Latin "pōtio".
Where this comes from
This definition is adapted from “poison” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.