/ Dictionary / Index B bright coal: Meaning and Definition of Find definitions for: bright' coal' Pronunciation: [key] coal consisting of alternating layers of clarain and vitrain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bright brighten Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language