/ Dictionary / Index M main yard: Meaning and Definition of Find definitions for: main' yard" Pronunciation: [key] a yard for a square mainsail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. main verb Mainz Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language