Any type of numbing or soothing drug.
Any substance or drug that reduces pain, induces sleep and may alter mood or behaviour; in some contexts, especially in reference to the opiates-and-opioids class, especially in reference to illegal drugs, and often both.
Of, or relating to narcotics.
Inducing sleep; causing narcosis.
Something that harms a person or thing.
A substance that is harmful or lethal to a living organism when ingested.
Any substance that inhibits catalytic activity.
An intoxicating drink; a liquor. (note: this sense is chiefly encountered in the phrases "name your poison" and "what's your poison ?")
To place false information into (a cache) as part of an exploit.
To cause (someone) to hate or to have unfair negative opinions.
To use poison to kill or paralyse (somebody).
To pollute; to cause to become poisonous.
To cause to become much worse.
To inhibit the catalytic activity of.