phase
noun
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(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”
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(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”form
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a particular point in the time of a cyclephase angle
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any distinct time period in a sequence of eventsstage
verb
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adjust so as to be in a synchronized condition“We phased the intake with the output of the machine.”
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arrange in phases or stages“phase a withdrawal”