Source : Webster's Revised Unabridged Dictionary (1913)

Meth \Meth\, n.
   See {Meathe}. [Obs.] --Chaucer.

Source : WordNet®

meth
     n : amphetamine used in the form of a crystalline hydrochloride;
         used as a stimulant to the nervous system and as an
         appetite suppressant [syn: {methamphetamine}, {methamphetamine
         hydrochloride}, {Methedrine}, {deoxyephedrine}, {chalk},
         {chicken feed}, {crank}, {glass}, {ice}, {shabu}, {trash}]