Definition of amphetamine noun from the Oxford Advanced Learner's Dictionary

 

amphetamine

 noun
noun
BrE BrE//æmˈfetəmiːn//
 
; NAmE NAmE//æmˈfetəmiːn//
 
[countable, uncountable] Addiction
 
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a drug that makes you feel excited and full of energy. Amphetamines are sometimes taken illegally. See related entries: Addiction Word Origin 1930s: abbreviation of its chemical name, a(lpha-)m(ethyl) phe(ne)t(hyl)amine.
See the Oxford Advanced American Dictionary entry: amphetamine