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


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 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 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

Recent Examples on the Web: Verb

The purchase comes as New York City is trying to phase out such housing, which has been criticized as unsafe and mismanaged. ... Corinne Ramey, WSJ, "New York City Pays $173 Million for 17 Buildings to Serve as Permanent Housing for Homeless," 4 Apr. 2019 But the company recently decided to phase out support for SHA-1 entirely in an upcoming security update, due to begin delivery on March 12. Mark Hachman, PCWorld, "Windows 7's support deadline may expire in July, if you don't apply this patch," 19 Feb. 2019 The country plans to phase out its use of coal and nuclear power in the coming decades. Frank Jordans, The Seattle Times, "Germany, US seek to set aside spat over natural gas supplies," 12 Feb. 2019 While past years’ budgets have been balanced using $20 million from the city’s water-sewer fund annually, the Commission decided in a 3-2 vote Tuesday night to phase out relying on that fund over the next four years. Meryl Kornfield,, "Fort Lauderdale may raise property taxes for first time in 12 years," 13 July 2018 At that meeting, policymakers decided the 19-country eurozone economy was strong enough to phase out their 2.4 trillion-euro ($2.8 trillion) bond-purchase stimulus at year-end. Washington Post, "Trade war fears a clear concern of European bank officials," 12 July 2018 Once any company hits 200,000 total EV sales in the US, the $7,500 federal tax credit for buyers of its electric vehicles starts to phase out. Jack Stewart, WIRED, "Tesla Finally Hits Its Model 3 Goal—And Immediately Ups the Ante," 2 July 2018 This year, eligibility starts phasing out at $120,000 for singles and $189,000 for married joint-filers. Ken Fisher, USA TODAY, "401(k) limits: 7 answers to your top retirement plan questions," 1 July 2018 The subsidy begins to phase out one full quarter after the quarter in which Tesla sells its 200,000th electric car in the U.S. Fortune, "Tesla's Mad Scramble to Meet Production Deadline Is Coming to an End," 30 June 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.

See More

First Known Use of phaseout


1951, in the meaning defined above


1940, in the meaning defined at transitive sense

Keep scrolling for more

Learn More about phaseout

Statistics for phaseout

Last Updated

25 Mar 2019

Look-up Popularity

Time Traveler for phaseout

The first known use of phaseout was in 1940

See more words from the same year

Keep scrolling for more

More Definitions for phaseout



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

Comments on phaseout

What made you want to look up phaseout? Please tell us where you read or heard it (including the quote, if possible).


to affect and impair by alcohol or a drug

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!