methBrE /meθ/ 🔊NAmE /meθ/ 🔊 (also crystal meth, crystal BrE /ˈkrɪstl/ 🔊 NAmE /ˈkrɪstl/ 🔊) noun [uncountable] (informal) a powerful illegal drug, methamphetamine, that looks like small pieces of glass 冰毒(即甲基苯丙胺)◆the growing meth problem in our rural communities我们乡村社区越来越严重的冰毒问题