Also known as: SS., SS-
SS has various meanings in the Genealogy category. Discover the full forms, definitions, and usage contexts of SS in Genealogy.
Speed in excess of that of sound. Velocity greater than the speed of sound. The SR-71 is characterized as a supersonic aircraft because it travels from three to four times the speed of sound. A supersonicaircraft can fly from New York to London in less than two hours.
GenealogyLast updated: