/ Dictionary / Index L lay sister: Meaning and Definition of Find definitions for: lay' sis"ter Pronunciation: [key] a woman who has taken religious vows and habit but is employed in her order chiefly in manual labor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Laysan Layton Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language