drug Definition–noun | 1. | Pharmacology. a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being. | | 2. | (in federal law) | a. | any substance recognized in the official pharmacopoeia or formulary of the nation. | | b. | any substance intended for use in the diagnosis, cure, mitigation, treatmen
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t, or prevention of disease in humans or other animals. | | c. | any article, other than food, intended to affect the structure or any function of the body of humans or other animals. | | d. | any substance intended for use as a component of such a drug, but not a device or a part of a device. | | | 3. | a habit-forming medicinal or illicit substance, esp. a narcotic. | | 4. | drugs, | a. | chemical substances prepared and sold as pharmaceutical items, either by prescription or over the counter. | | b. | personal hygienic items sold in a drugstore, as toothpaste, mouthwash, etc. | | | 5. | Obsolete. any ingredient used in chemistry, pharmacy, dyeing, or the like. | –verb (used with object) | 6. | to administer a medicinal drug to. | | 7. | to stupefy or poison with a drug. | | 8. | to mix (food or drink) with a drug, esp. a stupefying, narcotic, or poisonous drug. | | 9. | to administer anything nauseous to. | —Verb phrase | 10. | drug up, to take a narcotic drug: The addict prowled about for a place to drug up. | —Idiom | 11. | drug on the market, a commodity that is overabundant or in excess of demand in the market. Also, drug in the market. | |
From Dictionary interaction Definition–noun | 1. | reciprocal action, effect, or influence. | | 2. | Physics. | a. | the direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another. | | b. | the mathematical expression that specifies the nature and strength of this effect. | | |
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