/ Dictionary / Index L looking glass: Meaning and Definition of Find definitions for: look'ing glass" Pronunciation: [key] a mirror made of glass with a metallic or amalgam backing. the glass used in a mirror. anything used as a mirror, as highly polished metal or a reflecting surface. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. look-in looking-glass self Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language