/ Dictionary / Index C coak: Meaning and Definition of Find definitions for: coak Pronunciation: (kōk), [key] — n. Carpentry. (in a scarf joint) a tenon in one member fitting into a corresponding recess of the other. a dowel through overlapping timbers to prevent one from sliding across the other. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Coahuila coal Related Content Daily Word Quiz: longevity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language