/ Dictionary / Index M MDAP: Meaning and Definition of Find definitions for: MDAP Pronunciation: [key] Mutual Defense Assistance Program. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. MDA M-day Related Content Daily Word Quiz: pudgy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language