/ Dictionary / Index C cinder block: Meaning and Definition of Find definitions for: cin'der block" Pronunciation: [key] a concrete building block made with a cinder aggregate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cinder cinder concrete Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language