/ Dictionary / Index P propfan: Meaning and Definition of Find definitions for: prop•fan Pronunciation: (prop'fan"), [key] — n. a turbojet having a turbine-driven propeller that operates completely outside the jet engine. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. proper value prophage Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language