/ Dictionary / Index L Loos: Meaning and Definition of Find definitions for: Loos Pronunciation: (ls), [key] — n. 1870–1933, Austrian architect and writer. 1893–1981, U.S. writer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: loos (Thesaurus) loopy loose 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