NebbioloPronunciation: /ˌnɛbɪˈəʊləʊ, nebˈbjɔlo/Definition of Nebbiolo noun [mass noun] a variety of black wine grape grown in Piedmont in northern Italy. a red wine made from the Nebbiolo grape. Origin:Italian, from nebbia 'mist' (because the grape ripens in the autumn)Nebbiolo in other Oxford dictionaries Definition of Nebbiolo in the US English dictionary