methamphetamine

noun

meth·​am·​phet·​amine ˌme-tham-ˈfe-tə-ˌmēn How to pronounce methamphetamine (audio)
-thəm-,
-mən
: a synthetic or semisynthetic compound C10H15N that stimulates the central nervous system, is used medically in the form of its crystalline hydrochloride C10H15N·HCl especially to treat attention deficit hyperactivity disorder and obesity, and that is often abused illicitly for its stimulant properties
methamphetamine is a powerful addictive stimulant whose longtime consumers tend to suffer from paranoia, depression, hallucinations, and violent rages.William Finnegan

called also meth, methedrine, speed

compare crystal meth

Examples of methamphetamine in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Prosecutors say the three conspired to smuggle 26 pounds of methamphetamine into the Bay Area. Nate Gartrell, Mercury News, 5 June 2025 The subsequent search turned up 61 packages of methamphetamine, with a combined weight just over 7,700 pounds. Teri Figueroa, San Diego Union-Tribune, 4 June 2025 Last month, federal agents seized 1,730 pounds of methamphetamine, 238 pounds of cocaine, 257 pounds of powdered fentanyl and about 360,000 counterfeit fentanyl pills from the home. Jasmine Mendez, Los Angeles Times, 3 June 2025 He was picked up in Vadnais Heights on suspicion of drug possession (methamphetamine) and possessing a gun (he was prohibited after having been convicted of a crime of violence) and later charged with both offenses. Nick Ferraro, Twin Cities, 30 May 2025 See All Example Sentences for methamphetamine

Word History

First Known Use

1949, in the meaning defined above

Time Traveler
The first known use of methamphetamine was in 1949

Browse Nearby Words

Cite this Entry

“Methamphetamine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/methamphetamine. Accessed 14 Jun. 2025.

Kids Definition

methamphetamine

noun
meth·​am·​phet·​amine ˌmeth-am-ˈfet-ə-ˌmēn How to pronounce methamphetamine (audio)
: a drug derived from amphetamine that is often used illegally as a stimulant of the central nervous system

Medical Definition

methamphetamine

noun
meth·​am·​phet·​amine ˌmeth-am-ˈfet-ə-ˌmēn, ˌmeth-əm-, -mən How to pronounce methamphetamine (audio)
: an amine C10H15N that is used medically in the form of its crystalline hydrochloride C10H15N·HCl especially to treat attention deficit hyperactivity disorder and obesity and that is often abused illicitly as a stimulant

called also meth, methedrine, methylamphetamine, speed

More from Merriam-Webster on methamphetamine

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