from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The overindulgence in and dependence on an addictive substance, especially alcohol or a narcotic drug. Also called chemical abuse.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An overindulgence in and dependence of a drug or other chemical.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. excessive use of drugs
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