/ Dictionary / Index F Faraday dark space: Meaning and Definition of Find definitions for: Far'aday dark' space" Pronunciation: [key] — Physics. Physics. the dark region between the negative glow and the positive column in a vacuum tube occurring when the pressure is low. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Faraday cage Faraday effect Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language