/ Dictionary / Index H H.M.S.: Meaning and Definition of Find definitions for: H.M.S. Pronunciation: [key] Her Majesty's Service. His Majesty's Service. Her Majesty's Ship. His Majesty's Ship. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hms (Thesaurus) Hmong ho Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language