To phase is to do something gradually over a period of time.(verb)
An example of phase is when you gradually introduce a new product or you phase in the new product over a few years.
The definition of a phase is a distinct period of time in something's development.(noun)
See phase in Webster's New World College Dictionary
Origin: ModL phasis < Gr < phainesthai, to appear, akin to phainein: see fantasy
See phase in American Heritage Dictionary 4
Origin: Back-formation from New Latin phasēs, phases of the moon
Origin: , from Greek phaseis
Origin: , pl. of phasis, appearance
Origin: , from phainein, to show; see bhā-1 in Indo-European roots.
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