/ Dictionary / Index M My Lai: Meaning and Definition of Find definitions for: My Lai Pronunciation: (mē' lī'), [key] a hamlet in S Vietnam: U.S. forces' massacre of South Vietnamese civilians 1968. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mykonos Mylar Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language