blackberry

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various shrubs of the genus Rubus in the rose family, having usually prickly stems, compound leaves, and an aggregate fruit of small drupelets.
• noun The fruit of these plants, usually black, purple, or deep red.

from The Century Dictionary.

• noun The fruit of those species of Rubus in which the receptacle becomes juicy and falls off with the drupelets, in distinction from the raspberry.
• noun In some parts of England, the black currant, Ribes nigrum.

from the GNU version of the Collaborative International Dictionary of English.

• noun 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

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

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun bramble with sweet edible black or dark purple berries that usually do not separate from the receptacle
• noun large sweet black or very dark purple edible aggregate fruit of any of various bushes of the genus Rubus
• verb pick or gather blackberries