/ Dictionary / Index U United States Marine Corps: Meaning and Definition of Find definitions for: Unit'ed States' Marine' Corps". Pronunciation: [key] SeeAbbr.: USMC Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. United States International Trade Commission United States Naval Academy Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language