
Phase out
Time Span
Phasing out something can take several years and isn't usually done abruptly.

The use of plastic bags will be phased out over the next decade.
Policy Changes
Used to describe official plans by governments or organizations to end something.

The education department is phasing out old textbooks.
Negative Connotation
Often used for things considered outdated or harmful.

They're phasing out the inefficient machinery.
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