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to phase out
[phrase form: phase]
01
to gradually stop using, producing, or providing something
Example
The old curriculum will be phased out as the new one is introduced to schools.
The company plans to phase out the older models of their smartphones next year.
As electric cars become more popular, there's a push to phase out gasoline-powered vehicles.
Environmental regulations have phased out leaded gasoline, leading to the widespread use of unleaded alternatives.
International agreements like the Montreal Protocol aim to protect the ozone layer by phasing out ozone-depleting substances.
