betelPronunciation: /ˈbiːt(ə)l/Definition of betel noun [mass noun] 1the leaf of an Asian evergreen climbing plant, which in the East is chewed as a mild stimulant. 2the plant, related to pepper, from which betel leaves are taken. Piper betle, family Piperaceae Origin: mid 16th century: via Portuguese from Malayalam veṟṟilabetel in other Oxford dictionaries Definition of betel in the US English dictionary