a drug that is taken for nonmedicinal reasons (usually for mind-altering effects); drug abuse can lead to physical and mental damage and (with some substances) dependence and addiction

a drug that produces numbness or stupor; often taken for pleasure or to reduce pain; extensive use can lead to addiction

a narcotic that is considered relatively strong and likely to cause addiction

a preparation of the leaves and flowers of the hemp plant; much used in India

the most commonly used illicit drug; considered a soft drug, it consists of the dried leaves of the hemp plant; smoked or chewed for euphoric effect

purified resinous extract of the hemp plant; used as a hallucinogen

a chemical compound with the formula C5H11ONO.