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 The federal tax credit for solar panels currently covers 30 percent of the total cost, though that incentive begins a multiyear phaseout starting on January 1st, 2020. Sean O'kane, The Verge, "Tesla launches a rental plan to help its slumping home solar panel business," 19 Aug. 2019 The announcement comes a few months after Psyonix was purchased by Epic, a company that announced a similar loot box phaseout for Fortnite: Save the World back in January. Kyle Orland, Ars Technica, "After Epic purchase, Psyonix removes random loot boxes from Rocket League," 7 Aug. 2019 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WSJ, "Tesla to Cut Down on Board Members," 19 Apr. 2019 Recent Examples on the Web: Verb The program, considered outdated for more than a decade, is now being phased out. Ana Santos Rutschman, The Conversation, "Salad bars and water systems are easy targets for bioterrorists – and America’s monitoring system is woefully inadequate," 7 Nov. 2019 Credit for buying eligible General Motors vehicles is also being phased out. David Lightman,, "Senate seeks to end tax credit for electric vehicles," 5 Nov. 2019 Another is phasing out its cattle herds and receiving tourists and researchers. Jennie Erin Smith, New York Times, "Stalking the Endangered Wax Palm," 5 Nov. 2019 Under the bill, private prisons would be phased out completely by 2028. Tatiana Sanchez,, "California is trying to banish private immigration detention centers. ICE has other plans," 1 Nov. 2019 Both would be phased out by not enrolling any new students starting in the 2020-21 school year. Patrick O'donnell, cleveland, "Collinwood High would merge into Glenville; 10 other Cleveland schools could close in district downsizing," 18 Oct. 2019 And the Department of Energy phased out production of the light tubes used in the ballasts that used PCBs. Author: Tammy Webber, Martha Irvine, Anchorage Daily News, "Toxic PCBs linger in schools as EPA and lawmakers fail to act," 16 Oct. 2019 The second tax break, which would go into effect between 2019 and 2025, would phase out state income taxes on pensions and annuities for retirees with overall income less than $75,000, and for couples with less than $100,000. Keith M. Phaneuf,, "Tax breaks for seniors could widen gap between Connecticut’s rich and poor," 11 Oct. 2019 Under the legislation, all existing contracts with for-profit, private prisons and detention centers will be phased out by 2028. Li Cohen, CBS News, "California bans private prisons and detention centers," 11 Oct. 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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Time Traveler for phaseout

The first known use of phaseout was in 1940

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How to pronounce phase out (audio)

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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a calculated move

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