SS noun 20adjective 1 noun20 •A shiptype •Initialism of steamship. •Initialism of screw steamer (a screw-driven steamship) •Initialism of screenshot. •Abbreviation of Saints. •Initialism of stainless steel. •Initialism of social security. •Initialism of secret service. •Initialism of spring/summer, often followed by a year. •Initialism of shortstop. •(US, Navy) A conventionally-powered submarine •(US, Navy) diesel-powered attack submarine •(US, Navy) Initialism of subsurface, a subsurface ship, a submarine •Initialism of sum of squares. •NATO prefix-code for surface-to-surface missiles developed by the Soviet Union •Initialism of Subsahara: a geographic region of Africa, constituting all countries south of the Sahara Desert. •Initialism of side seam. •Initialism of spousal support. •Initialism of South Sumatra: a province of Indonesia. •Initialism of Segawa syndrome. adjective1 •Initialism of Subsaharan.