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