Definitions
1.nounAny 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.
2.nounAny type of numbing drug.
3.adjectiveOf, or relating to narcotics.
4.adjective(pharmaceutical effect) Inducing sleep; causing narcosis.