[ noun ] a point of convergence of light (or other radiation) or a point from which it diverges
Used in print(Tristram P. Coffin, "Folklore in the American Twentieth...)
Its folklore and legend , usually disguised as history , are allowed to account_for group_actions , to provide a focal_point for group loyalty , and to become a cohesive force for national identification .(Leon Uris, Mila 8....)
From the moment of the occupation Lublin became a focal_point .