blackberry

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of various shrubs of the genus Rubus, having usually prickly stems, compound leaves, and an aggregate fruit of small drupelets.
2. n. The fruit of these plants, usually black, purple, or deep red.

Century Dictionary and Cyclopedia

1. n. The fruit of those species of Rubus in which the receptacle becomes juicy and falls off with the drupelets, in distinction from the raspberry. The principal European species is R. fruticosus. In the United States there are several kinds, as the high blackberry, R. villosus, some varieties of which are extensively cultivated; the low blackberry or dewberry, R. Canadensis; the bush-blackberry, R. trivialis, of the Southern States; the running swamp-blackberry, R. hispidus; and the sand-blackberry, R. cuneifolius. In Scotland generally called bramble, and in the west of Scotland black-boyd or black-bide.
2. n. In some parts of England, the black currant, Ribes nigrum.

Wiktionary

1. n. A fruit-bearing shrub of the species Rubus fruticosus and some hybrids.
2. n. The soft fruit borne by this shrub, formed of a black (when ripe) cluster of drupelets.
3. n. UK The blackcurrant.
4. v. To gather or forage for blackberries.

GNU Webster's 1913

1. n. The fruit of several species of bramble (Rubus); also, the plant itself. Rubus fruticosus is the blackberry of England; Rubus villosus and Rubus Canadensis are the high blackberry and low blackberry of the United States. There are also other kinds.

WordNet 3.0

1. n. bramble with sweet edible black or dark purple berries that usually do not separate from the receptacle
2. n. large sweet black or very dark purple edible aggregate fruit of any of various bushes of the genus Rubus
3. v. pick or gather blackberries