/ Dictionary / Index D dark-field: Meaning and Definition of Find definitions for: dark-field Pronunciation: (därk'fēld"), [key] — adj. Optics. of or pertaining to the illumination of an object by which it is seen, through a microscope, as bright against a dark background. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dark-eyed junco dark horse Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language