cubebPronunciation: /ˈkjuːbɛb/Definition of cubeb noun a tropical shrub of the pepper family, which bears pungent berries. Genus Piper, family Piperaceae: several species [mass noun] the dried unripe berries of the cubeb, used medicinally and to flavour cigarettes. Origin: Middle English: from Old French cubebe, from Spanish Arabic kubēba, from Arabic kubābacubeb in other Oxford dictionaries Definition of cubeb in the US English dictionary