/ Dictionary / Index P prophage: Meaning and Definition of Find definitions for: pro•phage Pronunciation: (prō'fāj"), [key] — n. Microbiol. a stable, inherited form of bacteriophage in which the genetic material of the virus is integrated into, replicated, and expressed with the genetic material of the bacterial host. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. propfan prophase Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language