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 In July, InterContinental Hotels Group — which includes Crowne Plazas and Holiday Inns — announced a similar phaseout. Eric Zorn,, "Column: Tiny shampoo bottles won’t be on hotel sinks much longer. It’s time to toss these symbols of wasteful plastic convenience.," 22 Oct. 2019 Gary Emerito, a broker at Berkshire Hathaway HomeServices in Farmington, pointed to a six-year phaseout of state income tax on pension and annuity payments for residents earning $75,000 or less annually, or $100,000 for those filing jointly. Kenneth R. Gosselin,, "Courant analysis shows home prices in most Connecticut towns still struggling to recover from 2008 recession," 10 Oct. 2019 The news was dramatic enough to spur the signing of the Montreal Protocol by the end of 1987, kicking off the phaseout of CFCs. Olivia B. Waxman, Time, "In the 1980s, the World Acted to Save the Ozone Layer. Here's Why the Fight Against Climate Change Is Different," 23 Sep. 2019 As the deadline for Libor’s phaseout draws closer, companies have started to share with investors some of the potential fallout from moving to a new interest rate benchmark. Tatyana Shumsky, WSJ, "FASB Advances Toward Easing Accounting Burden for Libor Phaseout," 19 June 2019 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 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

Time Traveler

The first known use of phaseout was in 1940

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Last Updated

18 Nov 2019

Cite this Entry

“Phaseout.” The Dictionary, Merriam-Webster Inc., Accessed 21 November 2019.

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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

More from Merriam-Webster on phaseout

Rhyming Dictionary: Words that rhyme with phaseout

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