[ meth-am-fet-uh-meen, -min ]

  1. a central nervous system stimulant, C10H15N, used clinically in the treatment of narcolepsy, hyperkinesia, and for blood pressure maintenance in hypotensive states: also widely used as an illicit drug.

Compare Meanings

Click for a side-by-side comparison of meanings. Use the word comparison feature to learn the differences between similar and commonly confused words.

Origin of methamphetamine

First recorded in 1945–50; meth- + amphetamine

Words Nearby methamphetamine Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use methamphetamine in a sentence

British Dictionary definitions for methamphetamine


/ (ˌmɛθæmˈfɛtəmɪn) /

  1. a variety of amphetamine used for its stimulant action

Origin of methamphetamine

C20: from meth- + amphetamine

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for methamphetamine


[ mĕth′ăm-fĕtə-mēn′, -mĭn ]

  1. An amine derivative of amphetamine, C10H15N, used in the form of its crystalline hydrochloride both as a central nervous system stimulant in the medical treatment of obesity and attention deficit hyperactivity disorder and illicitly as a recreational drug.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.