Source : Webster's Revised Unabridged Dictionary (1913)

Grape \Grape\, n. [OF. grape, crape, bunch or cluster of grapes,
   F. grappe, akin to F. grappin grapnel, hook; fr. OHG. chrapfo
   hook, G. krapfen, akin to E. cramp. The sense seems to have
   come from the idea of clutching. Cf. {Agraffe}, {Cramp},
   {Grapnel}, {Grapple}.]
   1. (Bot.) A well-known edible berry growing in pendent
      clusters or bunches on the grapevine. The berries are
      smooth-skinned, have a juicy pulp, and are cultivated in
      great quantities for table use and for making wine and
      raisins.

   2. (Bot.) The plant which bears this fruit; the grapevine.

   3. (Man.) A mangy tumor on the leg of a horse.

   4. (Mil.) Grapeshot.

   {Grape borer}. (Zo["o]l.) See {Vine borer}.

   {Grape curculio} (Zo["o]l.), a minute black weevil
      ({Craponius in[ae]qualis}) which in the larval state eats
      the interior of grapes.

   {Grape flower}, or

   {Grape hyacinth} (Bot.), a liliaceous plant ({Muscari
      racemosum}) with small blue globular flowers in a dense
      raceme.

   {Grape fungus} (Bot.), a fungus ({Oidium Tuckeri}) on
      grapevines; vine mildew.

   {Grape hopper} (Zo["o]l.), a small yellow and red hemipterous
      insect, often very injurious to the leaves of the
      grapevine.

   {Grape moth} (Zo["o]l.), a small moth ({Eudemis botrana}),
      which in the larval state eats the interior of grapes, and
      often binds them together with silk.

   {Grape of a cannon}, the cascabel or knob at the breech.

   {Grape sugar}. See {Glucose}.

   {Grape worm} (Zo["o]l.), the larva of the grape moth.

   {Sour grapes}, things which persons affect to despise because
      they can not possess them; -- in allusion to [AE]sop's
      fable of the fox and the grapes.

Source : WordNet®

grape hyacinth
     n : any of various early flowering spring hyacinths native to
         Eurasia having dense spikes of rounded blue flowers
         resembling bunches of small grapes