/ Dictionary / Index U United States Navy: Meaning and Definition of Find definitions for: Unit'ed States' Na'vy Pronunciation: [key] the permanent or regular naval force of the United States, under the authority of the Department of Defense since 1947. Abbr.: USN Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. United States Naval Academy United States of America 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