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A drug or other ingested substance, such as alcohol or marijuana, whose habitual use is thought to lead to the use of very addictive and dangerous drugs such as cocaine and heroin.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Recreational Drugs) a recreational drug such as cannabis, the use of which is believed by some to encourage the user to try stronger drugs
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any mood-altering drug, as a stimulant or tranquilizer, that does not cause physical dependence but may lead to the use of addictive drugs, as heroin.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||gateway drug - a habit-forming drug that is not addictive but its use may lead to the use of other addictive drugs; "one college athlete recently called beer a gateway drug for young people"|
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