n.
a medicine or other substance which has a marked physiological effect when taken into the body.
▸a substance with narcotic or stimulant effects.
v.
(drugs, drugging, drugged)
administer a drug to, in order to induce stupor or insensibility.
Etymology
ME: from OFr. drogue, perh. from MDu. droge vate, lit. ‘dry vats’, referring to the contents.