1.  grapevine(n = noun.communication) pipeline, word of mouth - gossip spread by spoken communication; "the news of their affair was spread by word of mouth"
is a kind of comment, gossip, scuttlebutt

2.  grapevine(n = noun.plant) grape, grape vine - any of numerous woody vines of genus Vitis bearing clusters of edible berries;
is a kind of vine
has parts: grape
is a member of genus vitis, vitis
has particulars: fox grape, vitis labrusca, muscadine, vitis rotundifolia, common grape vine, vinifera, vinifera grape, vitis vinifera

   A vine or climbing shrub, of the genus Vitis, having small green flowers and lobed leaves, and bearing the fruit called grapes. [1913 Webster]
" The common grapevine of the Old World is Vitis vinifera, and is a native of Central Asia. Another variety is that yielding small seedless grapes commonly called Zante currants. The northern Fox grape of the United States is the V. Labrusca, from which, by cultivation, has come the Isabella variety. The southern Fox grape, or Muscadine, is the V. vulpina. The Frost grape is V. cordifolia, which has very fragrant flowers, and ripens after the early frosts." [1913 Webster]

grapevine, n.
1 any of various vines of the genus Vitis, esp. Vitis vinifera.
2 colloq. the means of transmission of unofficial information or rumour (heard it through the grapevine).

grapevine family