fɔːm fɔɹm feɪz feɪz steɪd͡ʒ adjust so as to be in a synchronized condition he phased the intake with the output of the machine arrange in phases or stages phase a withdrawal (astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun) the full phase of the moon (physical chemistry) a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary the reaction occurs in the liquid phase of the system a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle any distinct time period in a sequence of events we are in a transitional stage in which many former ideas must be revised or rejected