/ Dictionary / Index U U.S.C. Supp.: Meaning and Definition of Find definitions for: U.S.C. Supp. Pronunciation: [key] — Law. Law. United States Code Supplement. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. USCRC USDA 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