Definition of "narcotic" in English

noun

1. (pharmacology) 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.

2. Any type of numbing or soothing drug.

adjective

1. Of, or relating to narcotics.

2. (pharmacology) Inducing sleep; causing narcosis.