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

The phaseout range for married filing separately is not subject to an annual cost-of-living adjustment, according to the IRS, and remains between $0 and $10,000. —Jessica Dickler,kate Dore, Cfp®, CNBC, 1 Nov. 2024

Public worry in the 1980s about the growing ozone hole led to the 1987 Montreal Protocol, which started the phaseout of ozone-depleting chemicals. —Jeffrey Ball, Foreign Affairs, 14 June 2018

Verb

These are an older line, separate from the Ascent X models and they are currently being phased out. —Adam Campbell-Schmitt, Bon Appétit, 20 Mar. 2025

The legacy transports were phased out of service after an AAV sank during predeployment training off San Clemente Island in 2020, killing nine men, three from Southern California: Pfc. —Erika I. Ritchie, Orange County Register, 14 Mar. 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