Source : Webster's Revised Unabridged Dictionary (1913)

Addict \Ad*dict"\, p. p.
   Addicted; devoted. [Obs.]

Addict \Ad*dict"\, v. t. [imp. & p. p. {Addicted}; p. pr. & vb.
   n. {Addicting}.] [L. addictus, p. p. of addicere to adjudge,
   devote; ad + dicere to say. See {Diction}.]
   1. To apply habitually; to devote; to habituate; -- with to.
      ``They addict themselves to the civil law.'' --Evelyn.

            He is addicted to his study.          --Beau. & Fl.

            That part of mankind that addict their minds to
            speculations.                         --Adventurer.

            His genius addicted him to the study of antiquity.
                                                  --Fuller.

            A man gross . . . and addicted to low company.
                                                  --Macaulay.

   2. To adapt; to make suitable; to fit. [Obs.]

            The land about is exceedingly addicted to wood, but
            the coldness of the place hinders the growth.
                                                  --Evelyn.

   Syn: {Addict}, {Devote}, {Consecrate}, {Dedicate}. Addict was
        formerly used in a good sense; as, addicted to letters;
        but is now mostly employed in a bad sense or an
        indifferent one; as, addicted to vice; addicted to
        sensual indulgence. ``Addicted to staying at home.''
        --J. S. Mill. Devote is always taken in a good sense,
        expressing habitual earnestness in the pursuit of some
        favorite object; as, devoted to science. Consecrate and
        dedicate express devotion of a higher kind, involving
        religious sentiment; as, consecrated to the service of
        the church; dedicated to God.

Source : WordNet®

addict
     n 1: someone who is so ardently devoted to something that it
          resembles an addiction; "a golf addict"; "a car nut"; "a
          news junkie" [syn: {nut}, {freak}, {junkie}, {junky}]
     2: someone who is physiologically dependent on a substance;
        abrupt deprivation of the substance produces withdrawal
        symptoms
     v : to cause (someone or oneself) to become dependent (on
         something, especially a narcotic drug) [syn: {hook}]