n 1 a  :  a substance used as a medication or in the preparation of medication  b  according to the Food, Drug, and Cosmetic Act (1) :  a substance recognized in an official pharmacopoeia or formulary (2) :  a substance intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease (3) :  a substance other than food intended to affect the structure or function of the body (4) :  a substance intended for use as a component of a medicine but not a device or a component, part, or accessory of a device  2  :  something and often an illicit substance that causes addiction, habituation, or a marked change in consciousness
vb, drugged  drug*ging vt  1  :  to affect with a drug : esp  :  to stupefy by a narcotic drug  2  :  to administer a drug to vi  :  to take drugs for narcotic effect .
 
 
 
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