phase-in

[feyz-in]

noun

1. an act or instance of phasing in; gradual introduction or implementation.

phase in

verb

1. (tr, adverb) to introduce in a gradual or cautious manner

   the legislation will be phased in over two years

Word History and Origins

Origin of phase in¹

Noun use of verb phrase phase in

Idioms and Phrases

Introduce one stage at a time. For example, New technology must be phased in or the office will be overwhelmed. The antonym is phase out, meaning “to bring or come to an end, one stage at a time,” as in The department is phasing out all the older computers. [Mid-1900s]

Example Sentences

There also is a gradual phase-in over several years.

From Los Angeles Times

Although the original iteration of the rules called for an eventual ban on the sale of new gas-powered appliances, the final amended rules call for a slower phase-in of the clean technology that still allows consumers to purchase natural gas units if they wish.

From Los Angeles Times

Per Reuters, Big Pharma has lobbied Trump for “phase-in tariffs on imported pharmaceutical products in hopes of reducing the sting from the charges and to allow time to shift manufacturing.”

From Slate

That three-year phase-in is to apply only to those who need to retrofit their property, not to new construction.

From Los Angeles Times

In 2021, the local air district and Air Resources Board agreed to a gradual phase-in of the law, starting with large farm operations, with the goal of a near-complete burn ban by Jan. 1, 2025.

From Los Angeles Times