A Poison

1. A substance that is harmful or lethal to a living organism when ingested.
2. Something that harms a person or thing.
3. (informal) An intoxicating drink; a liquor.
4. (chemistry) Any substance that inhibits catalytic activity.

Usage notes

• Not to be confused with venom

Synonyms

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