Definition of phase in
- The country is phasing in new paper currency.
- The law will phase tax cuts in over a period of two years.
: a particular appearance or state in a regularly recurring cycle of changes
: a distinguishable part in a course, development, or cycle
: an aspect or part (as of a problem) under consideration
: to adjust so as to be in a synchronized condition
: to conduct or carry out by planned phases
: to introduce in stages
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