/ Dictionary / Index D dark of the moon: Meaning and Definition of Find definitions for: dark' of the moon' Pronunciation: [key] the period during which the moon is not visible. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. darkness dark reaction Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language