phaseout

1 of 2

noun

phase·​out ˈfāz-ˌau̇t How to pronounce phaseout (audio)
Synonyms of phaseoutnext
: a gradual stopping (as in operations or production) : a closing down by phases

phase out

2 of 2

verb

phased out; phasing out; phases out

transitive verb

: to discontinue the practice, production, or use of by phases

intransitive verb

: to stop production or operation by phases

Examples of phaseout in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
The phaseout begins at $200,000 for a married couple filing jointly. Camila Domonoske, NPR, 19 Mar. 2026 The Pentagon has initiated a six-month phaseout of Claude. Jennifer Jacobs, CBS News, 10 Mar. 2026
Verb
To date, the parties to the Montreal Protocol have phased out roughly 99% of ozone-depleting substances compared to 1990 levels — effectively eliminating the chemicals once used in nearly every refrigerator, air conditioner, and aerosol can on Earth. Big Think, 31 Mar. 2026 The credit begins to phase out for single filers earning more than $200,000 and married couples earning more than $400,000. Jenni Fink, MSNBC Newsweek, 30 Mar. 2026 See All Example Sentences for phaseout

Word History

First Known Use

Noun

1951, in the meaning defined above

Verb

1940, in the meaning defined at transitive sense

Time Traveler
The first known use of phaseout was in 1940

Browse Nearby Words

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Cite this Entry

“Phaseout.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phaseout. Accessed 1 Apr. 2026.

Kids Definition

phase out

verb
: to discontinue doing, producing, or using
phasing out old machinery

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