Breadcrumb Home > Dictionary > Index M Malay Peninsula: Meaning and Definition of Find definitions for: Ma'lay Penin'sula Pronunciation: [key] a peninsula in SE Asia, consisting of W (mainland) Malaysia and the S part of Thailand. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Malayo-Polynesian Malaysia ✖ Related Content Daily Word Quiz: sophism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language