any synthetic, semisynthetic, or natural chemical substance used in the treatment, prevention, or diagnosis of disease, or for other medical reasonsRelated: pharmaceutical
2.
a chemical substance, esp a narcotic, taken for the pleasant effects it produces
3.
drug on the market a commodity available in excess of the demands of the market
—vb , drugs, drugging, drugged
4.
to mix a drug with (food, drink, etc)
5.
to administer a drug to
6.
to stupefy or poison with or as if with a drug
Related: pharmaceutical, pharmaco-
[C14: from Old French drogue, probably of Germanic origin]