Blueberry \Blue"berry\, n. [Cf. {Blaeberry}.] (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 {V. Pennsylvanicum} and {V. vacillans}. {V. corymbosum} is the tall blueberry.