1. Ethyl alcohol denatured with methyl alcohol to prevent its use as an alcoholic beverage
   "He used meths to clean the paintbrushes";
   - methylated spirit [Brit], denatured alcohol, metho [Austral, informal], methylated spirits

1. An amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
   "meth abuse has become a serious problem in many communities"; "crystal meth abuse has become a serious problem in many communities";
   - methamphetamine, methamphetamine hydrochloride, Methedrine, deoxyephedrine, chalk [informal], crank [informal], glass [informal], ice [informal], shabu [Asia, informal], trash [informal], tik [S.Africa], crystal meth, crystal [informal]

Type of: amphetamine, controlled substance, denatured alcohol, pep pill [informal], speed [informal], upper [informal]

Encyclopedia: Meths