/ Dictionary / Index G glass wool: Meaning and Definition of Find definitions for: glass' wool' Pronunciation: [key] spun glass similar to wool, used for insulation, filters, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. glassware glasswork Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language