phase·​out | \ ˈfāz-ˌau̇t How to pronounce phaseout (audio) \

Definition of phaseout

 (Entry 1 of 2)

: a gradual stopping (as in operations or production) : a closing down by phases

phase out

phased out; phasing out; phases out

Definition of phase out (Entry 2 of 2)

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: Noun

Getting the lead out of gas In 1974, the EPA began a phaseout of lead from gasoline in the U.S., a process that completed in 1995. Brian Clark Howard, National Geographic, "49 environmental victories since the first Earth Day," 22 Apr. 2019 Alternatively, Xcel proposes to spend $2.7 billion for renewable wind and solar systems and the phaseout of the old coal plants. Dp Opinion, The Denver Post, "Letters: One small step for man began with giant leaps of faith of many (7/20/19)," 21 July 2019 Buzyn told Le Parisien newspaper that there would be a phaseout period before 2021. Washington Post, "Uber offers roomier 'comfort rides'," 10 July 2019 The budget funds the third year of a six-year car tax phaseout that will be completed in 2023. Edward Fitzpatrick,, "Raimondo signs the state budget, but isn’t entirely happy about it," 5 July 2019 The approved motion by Highland Mayor Pro Tem Larry McCallon, a Republican who chairs the committee, did not include the option of a phaseout and would be easier for refineries to meet. Tony Barboza,, "Air quality committee rejects ban on toxic acid used in South Bay refineries," 22 June 2019 The phaseout of four directors follows a settlement with the Securities and Exchange... Tim Higgins, WSJ, "Tesla to Cut Down on Board Members," 19 Apr. 2019 The moves are leading some experts to step up estimates for the phaseout of coal power in the U.S. Katherine Blunt, WSJ, "Utilities Speed Up Closure of Coal-Fired Power Plants," 9 Jan. 2019 Tesla crossed the 200,000 milestone in July of 2018, triggering a similar phaseout that was complicated by the Model 3's production and delivery status. Eric Limer, Popular Mechanics, "The $7,500 Tax Credit for Buying an Electric Chevy Might Be Disappearing," 2 Jan. 2019

Recent Examples on the Web: Verb

Germany decided to phase out all its nuclear power plants in the wake of the Fukushima disaster in 2011. Sheena Mckenzie, CNN, "How to demolish a nuclear power plant without blowing it up," 16 Aug. 2019 One problem is that not everything is going entirely according to the Montreal Protocol, which called for a potent ODS called CFC-11 to be fully phased out by 2010. Cathleen O'grady, Ars Technica, "While ozone is recovering, we’re doing things to prolong the process," 30 July 2019 The balance of his results made him the best candidate to replace Jones as the franchise began to phase out the veteran both on and off the field. Jon Meoli,, "From Adam Jones’ heir to Double-A Bowie, Cedric Mullins demoted again to ‘get some positive mojo working’," 19 July 2019 But the plan would mean phasing out the casino’s long-time harness racetrack in favor of a jai alai fronton that seats up to 300 people, suggests the casino’s parent, ElDorado Resorts, in a proposal filed with the City of Pompano Beach. David Lyons,, "Goodbye horses, hello jai alai? Isle Casino Pompano looks to revive fast-paced game," 12 July 2019 Ford has decided to phase out saloons altogether in its home market, for example, while GM has left Europe and is consolidating its North American operations. The Economist, "Three industriesSupply chains for different industries are fragmenting in different ways," 11 July 2019 The Bradleys were used in the Persian Gulf and Iraq wars, but are expected to be phased out in the coming years. Heather Timmons, Quartz, "Here are the two tanks that will rumble through Trump’s July 4th spectacle," 2 July 2019 Fifty coal power plants have shut down during Trump’s presidency so far, and more are likely to follow as states increasingly pledge to phase out fossil fuels or shift toward gas. Jon Porter, The Verge, "US power output from renewables exceeds coal for the first time in history," 26 June 2019 Winning new play equipment through this competition would help offset costs to the PTO, which could slowly begin to phase out older pieces. Lydia Gerike,, "Elementary schools in Bristol, Southington could win playground equipment in recycling competition," 26 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'phaseout.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of phaseout


1951, in the meaning defined above


1940, in the meaning defined at transitive sense

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Last Updated

12 Aug 2019

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Time Traveler for phaseout

The first known use of phaseout was in 1940

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English Language Learners Definition of phaseout

US : the act of stopping something gradually over a period of time in a planned series of steps or phases

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Rhyming Dictionary: Words that rhyme with phaseout

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to move or obtain by small maneuvers

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