/ Dictionary / Index U USRC: Meaning and Definition of Find definitions for: USRC Pronunciation: [key] United States Reserve Corps. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. USR U.S. RDA 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