/ Dictionary / Index U USCG: Meaning and Definition of Find definitions for: USCG Pronunciation: [key] United States Coast Guard. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. U.S.C. and G.S. USCRC 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