- any of a category of behavior-altering or addictive drugs, as heroin or cocaine, whose possession and use are restricted by law.
Origin of controlled substance
First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- A drug or chemical substance whose possession and use are regulated under the Controlled Substances Act.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.