/ Dictionary / Index M mossy horn: Meaning and Definition of Find definitions for: moss'y horn' Pronunciation: [key] an old steer, esp. a longhorn with scaly horns. an aged cowboy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mossy most Related Content Daily Word Quiz: maritime Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language