/ Dictionary / Index C coalification: Meaning and Definition of Find definitions for: coal•i•fi•ca•tion Pronunciation: (kō"lu-fi-kā'shun), [key] — n. Geol. the conversion of plant material into coal by natural processes, as by diagenesis and, in some instances, metamorphism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coal hod coaling station Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language