phase - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “phase”

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phase

noun [C]  us   /feɪz/
any stage in a series of events or in a process of development: The project is only in its first phase of planning, so we haven’t yet established the cost. The phases of the moon are the regular changes in its shape as it appears to people on earth. physics A phase is one of the forms in which matter can exist, such as solid, liquid, or a gas. physics A phase is also one of the stages or points in a repeating process measured from a specific starting point.
(Definition of phase from the Cambridge Academic Content Dictionary © Cambridge University Press)
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