/ Dictionary / Index P phaseout: Meaning and Definition of Find definitions for: phase•out Pronunciation: (fāz'out"), [key] — n. an act or instance of phasing out; planned discontinuation or expiration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phase modulation phase rule Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language