phase in

phrasal verb·1 sense·particle in

Meanings

1

Introduce something gradually in stages

Why “in”? Entering the activity. In shows the moment you start doing something.

They'll phase in the new system.
They'll introduce the new system gradually in stages.
The school phased in the timetable.
The school introduced the timetable gradually in stages.

Don't confuse with

phase inphase out

Phase in means introduce something gradually in stages. Phase out means discontinue gradually.

Test yourself

They'll phase in the new system. What does it mean?

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