phase out

phrasal verb·1 sense·particle out

Meanings

1

Discontinue gradually

Why “out”? Pushing outward to eliminate. What is removed is sent away.

They phased out the old model last year.
They gradually discontinued the old model over the course of last year.
They phased out the old model over two years.
They gradually discontinued the old model over two years.

Don't confuse with

phase outphase in

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

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