noun
1.
a substance used by itself or in a mixture in the treatment or diagnosis of disease
a life-sustaining drug
Synonyms: biologic, medicinal, pharmaceutic, pharmaceutical
Related Word: cure, medicament, medication, medicine, physic, remedy, specific; simple
2.
a narcotic substance or preparation
depended on drugs to make life bearable
Synonyms: dope, ||hop, narcotic, opiate