/ Dictionary / Index U U.S.S.: Meaning and Definition of Find definitions for: U.S.S. Pronunciation: [key] United States Senate. United States Service. United States Ship. United States Steamer. United States Steamship. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. U.S. RDA U.S.S.B. Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language