/ Dictionary / Index M Messenia: Meaning and Definition of Find definitions for: Mes•se•ni•a Pronunciation: (mu-sē'nē-u, -sēn'yu), [key] — n. a division of ancient Greece, in the SW Peloponnesus: an important center of Mycenaean culture. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. messenger RNA Messerschmitt Related Content Daily Word Quiz: philately Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language