addict

Short definition from Wiktionary

Noun

1. 1
   A person who is addicted, especially to a harmful drug.
2. 2
   An adherent or fan (of something).

Adjective

1. 1
   Addicted.
2. 2
   Bound, tied to, obligated.

Verb

1. 1
   To deliver (someone or something) following a judicial decision.
2. 2
   To devote (oneself) to a given activity, occupation, thing etc.
3. 3
   To bind (a person or thing) to the service of something.
4. 4
   To devote or pledge (oneself) to a given person, cause etc.
5. 5
   To devote (one's mind, talent etc.) to a given activity, occupation, thing etc.
6. 6
   To make (someone) become devoted to a given thing or activity; to cause to be addicted.