Definition of "substance abuse" []

• The overindulgence in and dependence on an addictive substance, especially alcohol or a narcotic drug. Also called chemical abuse. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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