/ Dictionary / Index M muff glass: Meaning and Definition of Find definitions for: muff' glass" Pronunciation: [key] sheet glass made from a blown cylinderthat is split and flattened. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. muff muffin Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language