n. 25B6; noun
the final phase of the campaign : STAGE, period, chapter, episode, part, step, point, time, juncture.
he's going through a difficult phase : PERIOD, stage, time, spell; Brit. informal patch.
the phases of the moon : ASPECT, shape, form, appearance, state, condition.
25A0; phase something in INTRODUCE GRADUALLY, begin to use, ease in.
25A0; phase something out WITHDRAW GRADUALLY, discontinue, stop using, run down, wind down.