whortleberry n erect European blueberry having solitary flowers and blue-black berries n blue-black berries similar to American blueberries Usage(s) Often served with sour cream and a whortleberry-and-apple salad. Often served with sour cream and a whortleberry-and-apple salad. Synonym(s) bilberry whinberry blaeberry Viccinium myrtillus European blueberry