[n. ad-ikt; v. uh-dikt]
a person who is addicted to an activity, habit, or substance: a drug addict.
verb (used with object)
to cause to become physiologically or psychologically dependent on an addictive substance, as alcohol or a narcotic.
to habituate or abandon (oneself) to something compulsively or obsessively: a writer addicted to the use of high-flown language; children addicted to video games.

1520–30; < Latin addictus assigned, surrendered (past participle of addīcere, equivalent to ad- ad- + dic- (variant stem of dīcere to fix, determine) + -tus past participle suffix)

nonaddict, noun
nonaddicting, adjective

1. adherent, devotee; fanatic; junkie. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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World English Dictionary
vb (often foll by to)
1.  to cause (someone or oneself) to become dependent (on something, esp a narcotic drug)
2.  a person who is addicted, esp to narcotic drugs
3.  informal a person who is devoted to something: a jazz addict
[C16: (as adj and as vb; n use C20): from Latin addictus given over, from addīcere to give one's assent to, from ad- to + dīcere to say]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1520s, adj., "delivered, devoted," from L. addictus, pp. of addicere "to deliver, award, yield, devote," from ad- "to" + dicere "say, declare" (see diction), but also "adjudge, allot." Modern sense is really self-addicted "to give over or award (oneself) to someone or some
practice" (c.1600); specialization to narcotics dependency is from c.1910. The noun is first recorded 1909, in reference to morphine. Related: Addicted (1530s, "delivered over" by judicial sentence; modern meaning "dependent on a drug" from 1913); adj. addictive (1939 in the narcotics sense).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

addict ad·dict (ə-dĭkt')
v. ad·dict·ed, ad·dict·ing, ad·dicts
To become or cause to become compulsively and physiologically dependent on a habit-forming substance. n. (ād'ĭkt)
One who is addicted, as to narcotics.

ad·dic'tive adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences for addict
He was not known to be a drug addict, but did use marijuana and alcohol.
Typically, the addict is surprised by the intervention of friends and family members.
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