/ Dictionary / Index W waffle slab: Meaning and Definition of Find definitions for: waf'fle slab" Pronunciation: [key] — Building Trades. Building Trades. a reinforced-concrete floor and roof construction employing a square grid of deep ribs with coffers in the interstices. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. waffle cloth wafflestompers Related Content Daily Word Quiz: banshee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language