retrofit

verb

ret·​ro·​fit ˈre-trō-ˌfit 

ˌre-trō-ˈfit

retrofitted or retrofit; retrofitting; retrofits

transitive verb

1

: to furnish (something, such as a computer, airplane, or building) with new or modified parts or equipment not available or considered necessary at the time of manufacture

2

: to install (new or modified parts or equipment) in something previously manufactured or constructed

3

: to adapt to a new purpose or need : modify

retrofit the story for a new audience

retrofit

ˈre-trō-ˌfit

noun

Did you know?

The concept of retrofitting became an urgent necessity during World War II, when weapons technology was advancing at an intense pace and planes and ships were becoming outdated even before their construction was complete, and the only solution was to retrofit the completed craft with the brand-new technology. Retrofitting was revived on a massive scale during the energy crisis of the 1970s, when new features were added to millions of old houses to make them more energy-efficient. Retrofitting is thus different from merely renovating, which may not involve any new technology at all.

Examples of retrofit in a Sentence

The factory has been retrofitted to meet the new safety regulations.

We can retrofit your car with the new fuel system.

Recent Examples on the Web

Branislav Dimitrijevic, an engineering professor of the New Jersey Institute of Technology, said retrofitting trains to prevent roof access would be expensive. —Dave Smith, Fortune, 7 Oct. 2025

Walmart also has plans to retrofit 42 other locations with automation technology by 2030. —Jennifer Bringle, Sourcing Journal, 6 Oct. 2025

The researchers tested their idea in Kansas City, Missouri, retrofitting 23 streetlights to serve as chargers. —Neetika Walter, Interesting Engineering, 3 Oct. 2025

Researchers, meanwhile, have studied the feasibility of retrofitting certain mid-range jets (like the Boeing 737-800, Airbus A320, ATR 72, and Embraer 190) with windowless designs and have reported some promising results. —Mack Degeurin, Popular Science, 2 Oct. 2025

Word History

First Known Use

1949, in the meaning defined at sense 1

Rhymes for retrofit

• candlelit
• counterfeit
• hypocrite
• monazite
• resubmit
• acquit
• admit
• amrit
• armpit
• backlit
• befit
• cockpit

Kids Definition

retrofit

verb

ret·​ro·​fit ˈre-trō-ˌfit 

: to install (new or modified parts or equipment) in something previously manufactured or constructed