Pronunciation: /ˈgreɪpvʌɪn/
noun
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1a vine native to both Eurasia and North America, especially one bearing grapes used for eating or winemaking. - Genus Vitis, family Vitaceae: many species, in particular V. vinifera and the American V. labrusca
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2 informal used to refer to the circulation of rumours and unofficial information: I’d heard on the grapevine that the business was nearly settled