n.
1.someone who is so ardently devoted to something that it resembles an addiction
2.someone who is physiologically dependent on a substance addict v.
1.to cause (someone or oneself) to become dependent (on something, especially a narcotic drug)
Idiom of the Day
to be talked out
to be tired of talking, to be unable to talk anymore after talking for a long time
I was talked out and had little to say for the rest of the dinner party.