blueberry

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

• noun Any of various plants of the genus Vaccinium, having white to reddish, urn-shaped or tubular flowers and edible blue to blue-black berries, especially the highbush blueberry and the lowbush blueberry.
• noun The fruit of any of these plants.
• noun A usually blue-gray spherule that is found in soil and sedimentary rock and is rich in hematite, produced by the weathering of rock or by precipitation from rock by moving groundwater.

from The Century Dictionary.

• noun In America: The fruit of several species of Vaccinium, ordinarily distinguished from the various kinds of huckleberry by its blue color and smaller seeds. The swamp or tall blueberry is the Vaccinium corymbosum; the low blueberry, V. vacillans; and the dwarf blueberry, V. Pennsylvanicum. See bilberry.
• noun Another name of the cohosh, Caulophyllum thalictroides.
• noun In Australia: The fruit of the blueberry-tree, or the tree itself.
• noun The berry-like fruit of Dianella lævis, of the lily family.

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

• noun (Bot.) The berry of several species of Vaccinium, an ericaceous genus, differing from the American huckleberries in containing numerous minute seeds instead of ten nutlets. The commonest species are Vaccinium Pennsylvanicum and Vaccinium vacillans. Vaccinium corymbosum is the tall blueberry.

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

• noun An edible round berry belonging to the cowberry family. (A botanically false berry.) It has flared "crowns" at the end that turn blue on ripening.
• noun The shrub of the above-mentioned berry.
• noun A dark blue colour.
• adjective Of a dark blue colour.
• verb To gather or forage for blueberries.

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

• noun any of numerous shrubs of the genus Vaccinium bearing blueberries
• noun sweet edible dark-blue berries of either low-growing or high-growing blueberry plants