/ Dictionary / Index U U.S.C.A.: Meaning and Definition of Find definitions for: U.S.C.A. Pronunciation: [key] United States Code Annotated. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. U.S.C. U.S.C. and G.S. Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language