phase meaning and definition

PHASE noun

Definition of phase (noun)

1. 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"
   • synonyms: stage
2. (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"
   • synonyms: form
3. a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle
   • synonyms: phase angle
4. (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"

PHASE verb

Definition of phase (verb)

1. arrange in phases or stages
   • "phase a withdrawal"
2. adjust so as to be in a synchronized condition
   • "he phased the intake with the output of the machine"