phaseout

1 of 2

noun

phase·​out ˈfāz-ˌau̇t 

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

phase out

2 of 2

verb

phased out; phasing out; phases out

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

Meaning, as of now, there are no statewide regulations in place to prevent large-scale dumping of plastic bags already in storage once the phaseout begins. —Chaewon Chung, Sacbee.com, 23 Dec. 2025

For married couples filing jointly, the phaseout begins at $170,000. —Annie Nova, CNBC, 29 Nov. 2025

Verb

Curbing emissions and phasing out outdated factories As part of the latest regulatory push, Beijing has introduced a comprehensive package of updates targeting energy efficiency and emissions across its core industrial base. —Bojan Stojkovski, Interesting Engineering, 28 Dec. 2025

While profits and losses are probably the ultimate measure of success, the metrics of streaming underwent a rethink this year, with Netflix and Disney announcing plans to phase out quarterly reports of subscriber numbers. —Dade Hayes, Deadline, 28 Dec. 2025

Word History

First Known Use

Noun

1951, in the meaning defined above

Verb

1940, in the meaning defined at transitive sense

Rhymes for phaseout

• roundabout
• runabout
• sauerkraut
• thereabout
• turnabout
• about
• bailout
• blackout
• blowout
• breakout
• burnout
• buyout

Kids Definition

phase out

verb

: to discontinue doing, producing, or using

phasing out old machinery