Jamaica \Ja*mai"ca\, n. One of the West India is islands. {Jamaica ginger}, a variety of ginger, called also {white ginger}, prepared in Jamaica from the best roots, which are deprived of their epidermis and dried separately. {Jamaica pepper}, allspice. {Jamaica rose} (Bot.), a West Indian melastomaceous shrub ({Blakea trinervis}), with showy pink flowers.