Medical Dictionary


noun ad·dic·tion \ə-ˈdik-shən\

Medical Definition of ADDICTION

:  compulsive physiological need for and use of a habit-forming substance (as heroin, nicotine, or alcohol) characterized by tolerance and by well-defined physiological symptoms upon withdrawal; broadly :  persistent compulsive use of a substance known by the user to be physically, psychologically, or socially harmful—compare habituation


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