/ Dictionary / Index M marsh deer: Meaning and Definition of Find definitions for: marsh' deer" Pronunciation: [key] a large South American deer, Blastocerus dichotomus, that lives in forests near rivers and swamps: an endangered species. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. marsh cress marsh elder Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language