phase·​out | \ˈfāz-ˌau̇t \

Definition of phaseout 

(Entry 1 of 2)

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

phase 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

Tesla is also facing the phaseout of a generous $7,500 electric-vehicle tax credit next year in the United States, which could be a drag on sales in 2019 and beyond. Timothy B. Lee, Ars Technica, "Why almost everyone was wrong about Tesla’s cash flow situation," 26 Oct. 2018 The ban comes after the FDA in 2015 deemed artificial trans fats to be unsafe to eat and ordered a three-year phaseout period of the ingredient. James Hohmann, Washington Post, "The Daily 202: From ‘I alone can fix it’ to ‘Congress alone can fix it,’ Trump passes the buck on family separation," 19 June 2018 Despite the phaseout in the 2015 omnibus bill, wind developers can still quality for 10 years of subsidies with startup by the end of 2023. WSJ, "Government Is Bad at Picking Energy Winners," 13 June 2018 The phaseout of the personal property tax on industrial equipment, which began in 2014 and is still being phased in, is estimated to cost about $1.3 billion. Paul Egan, Detroit Free Press, "The next big corporate tax cut? Senate panel OKs big break for utilities," 5 June 2018 Our columnist Dan Neil explains the real reason for the sedan phaseout. Gerard Baker, WSJ, "The 10-Point.," 4 May 2018 The plan is far from perfect, but the direction is now clear—a phaseout of carbon emissions.’ —Veronica Frank of Greenpeace. Costas Paris, WSJ, "Shipping Regulators Reach Deal to Cut Carbon Emissions," 13 Apr. 2018 Those include the phaseout of the personal property tax on manufacturing equipment and a $600-million-a-year general fund commitment to improve the state's roads. Paul Egan, Detroit Free Press, "Snyder cautions lawmakers to be fiscally responsible before passing tax cut legislation," 23 Jan. 2018 Perhaps a five-year Medicaid phaseout, the same growth rate as the House bill, and waivers on age rating and essential health benefits but not the community ratings that impact people with pre-existing conditions. Jim Newell, Slate Magazine, "Trumpcare Is on the March," 9 June 2017

Recent Examples on the Web: Verb

An older missile system, Sea Sparrow is being phased out by most U.S. allies and military equipment customers in favor of a newer system, Evolved Seasparrow. Kyle Mizokami, Popular Mechanics, "Why Does This German Frigate Have Drone “Kill Marks”?," 27 Aug. 2018 In wake of the #GrabYourWallet campaign, Ivanka Trump’s line been similarly phased out by Nordstrom, Neiman Marcus,, DSW,, Belk, ShopStyle, and Gilt, according to Business Insider., "Ivanka Trump’s Clothing Line Pulled From Yet Another Department Store," 14 July 2018 Seattle Public Utilities said a 2008 ordinance has phased out various plastic products from the food industry., "No more plastic straws in Seattle," 2 July 2018 The Melvyn’s Darn Good Coffee brand previously served at Einstein will be phased out, a spokeswoman said. Ann Zaniewski, Detroit Free Press, "Caribou Coffee opening inside metro Detroit Einstein Bros. Bagels shops," 29 June 2018 He was supposed to be watched by a third-party custodian 24 hours a day — a practice the Department of Corrections and court system is phasing out in favor of electronic monitoring and other bail supervision. Michelle Theriault Boots, Anchorage Daily News, "Wasilla man who fled state on last day of child sex abuse trial apprehended in Washington," 28 June 2018 The company told Reuters its Partner Categories tool will still be phased out by October. NBC News, "Facebook releases new privacy safeguards on how advertisers handle data," 13 June 2018 Tetrev hopes to see people phase out tableware from big-box stores in favor of his handmade pieces. Caitlin Mullen,, "'It's art that's to be used': Oak Park pottery shop owner says his creations are not meant to be locked away," 12 June 2018 But, last month, the Belgian government agreed a new energy pact - reviving and confirming a policy, which will see nuclear power phased out in the next seven years. Melanie Feuk, Houston Chronicle, "Healthcare providers discuss industry’s future in Lake Houston area," 17 Apr. 2018

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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Statistics for phaseout

Last Updated

18 Nov 2018

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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

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

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