Drug - definition of drug by The Free Dictionary
drug (drŭg) n. 1. a. A substance used in the diagnosis, treatment, or prevention of a disease or as a component of a medication. b. Such a substance as recognized or defined by the US Food, Drug, and Cosmetic Act. 2. A chemical substance, such as a narcotic or hallucinogen, that affects the central nervous system, causing changes in behavior and often ...
DA: 34 PA: 16 MOZ Rank: 62