TrebbianoPronunciation: /ˌtrɛbɪˈɑːnəʊ/Definition of Trebbiano noun [mass noun] a variety of wine grape widely cultivated in Italy and elsewhere. a wine made from the Trebbiano grape. Origin:Italian, from the name of the River Trebbia, in northern central ItalyTrebbiano in other Oxford dictionaries Definition of Trebbiano in the US English dictionary