/ Dictionary / Index L Las Casas: Meaning and Definition of Find definitions for: Las Ca•sas Pronunciation: (läs kä'säs), [key] 1474–1566, Spanish Dominican missionary and historian in the Americas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lascar Lascaux Cave Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language