Sorb \Sorb\, n.[L. sorbus the tree, sorbum the fruit; cf. F. sorbe. See Service tree.]

(Bot.)
   (a) The wild service tree (Pyrus torminalis) of Europe; also, the rowan tree.
   (b) The fruit of these trees.

Sorb apple, the fruit of the sorb, or wild service tree.

Sorb tree, the wild service tree.

Source: Webster's Revised Unabridged Dictionary (1913)