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 or soothing drug.
3.AdjectiveOf, or relating to narcotics.
4.AdjectiveInducing sleep; causing narcosis.