To make into a narcotic.
To use a narcotic in order to make (someone) drowsy or insensible; to anesthetize, to drug.
To dull the senses of (a person, place etc.).
To use poison to kill or paralyse (somebody).
To place false information into (a cache) as part of an exploit.
To cause (someone) to hate or to have unfair negative opinions.
To pollute; to cause to become poisonous.
To cause to become much worse.
To inhibit the catalytic activity of.
A substance that is harmful or lethal to a living organism when ingested.
Any substance that inhibits catalytic activity.
Something that harms a person or thing.
An intoxicating drink; a liquor. (note: this sense is chiefly encountered in the phrases "name your poison" and "what's your poison ?")