/ Dictionary / Index L Lemass: Meaning and Definition of Find definitions for: Le•mass Pronunciation: (lu-mas'), [key] 1899–1971, prime minister of Ireland 1959–66. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Le Mans LeMay 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