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 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 The Washington state Legislature last session passed and Gov. Jay Inslee has signed into law a phaseout of Atlantic salmon net-pen farming in Washington, with no new leases allowed after the current ones expire by 2025. Lynda V. Mapes, The Seattle Times, "Restocking Atlantic salmon pens blocked by court," 13 Apr. 2018 For band, a program that has wide participation in the district, the decision before the board is one of elimination or a phaseout, Schilling said. Pioneer Press,, "Tough choices: Norridge District 80 has decisions looming on band, kindergarten and sports programs," 22 Jan. 2018 There’s a relatively simple fix to this problem: The LIFT Act could give its $250 to $500 per month benefit to every household under the phaseout limit, without phasing in at all. Dylan Matthews, Vox, "Kamala Harris’s new basic income-style bill is so frustratingly close to being great," 19 Oct. 2018 The income tax phaseout would start in the third year and would be tied to revenue triggers so that the state would be able to balance the budget. Christopher Keating,, "Eliminating The Income Tax Is A Popular Topic For Republicans On The Campaign Trail, But Actually Doing It Is More Difficult," 1 July 2018 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

Recent Examples on the Web: Verb

Tesla said the move was to help make up for the phasing out of federal tax incentives for its vehicles, beginning this year. Tim Higgins, WSJ, "Tesla Shares Sink on Model 3 Delivery Miss, Price Cut," 2 Jan. 2019 Shearling and leather will still be used in collections, and the remaining fur products are slowly being phased out of the line. Steff Yotka, Vogue, "Burberry’s Future is Fur-Free—And Much More Sustainable," 6 Sep. 2018 Burberry's existing fur products will be phased out of stores and the brand's ban on fur will be effective immediately, starting with Tisci's first collection at London Fashion Week this September. Lauren Alexis Fisher, Harper's BAZAAR, "Burberry Vows to Stop Burning Unsold Merchandise and Using Real Fur," 6 Sep. 2018 Washington, Oregon and California all are seeking to phase out of coal power. Hal Bernton, The Seattle Times, "New Trump rule to aid coal-power plants unlikely to slow Northwest push for cleaner electricity," 21 Aug. 2018 Given the established health, safety and welfare risks that asbestos poses at all stages of its mining and usage, the AIA urges asbestos to be treated as a high priority chemical that is phased out of usage. Alissa Walker, Curbed, "AIA says EPA should impose a ‘blanket ban’ on asbestos," 9 Aug. 2018 As the Air Force began phasing out the planes in the early 1970s, NASA was interested in using them for its programs to study Earth. Eric Berger, Ars Technica, "Three high-flying birds soar together for the first time since the 1970s," 11 Nov. 2018 The presumption was that new power plants would be built with modern pollution controls and old plants would gradually phase out and close down. David Roberts, Vox, "The 6 things you most need to know about Trump’s new climate plan," 24 Aug. 2018 Companies including Alaska Airlines and Ikea are phasing out straws, and some cities and municipalities are banning straws and other single-use plastic. Sarah Gray, Fortune, "Hyatt Hotels, Like Starbucks, Says 'Good-Bye' to Plastic Straws," 9 July 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

14 Jan 2019

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Time Traveler for phaseout

The first known use of phaseout was in 1940

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More Definitions for phaseout



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

More from Merriam-Webster on phaseout

Rhyming Dictionary: Words that rhyme with phaseout

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