Question

retrofit The office building has been retrofitted with air-conditioning, but the result has been a mixed success. ˈrɛtroʊˌfɪt

Accepted Answer

To furnish something with new or modified parts or equipment that was optional or unavailable at the time of manufacture. 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during World War II, when weapons technology was advancing at an intense pace and planes and ships were becoming outdated even before their construction was complete, and the only solution was to retrofit the completed craft with the brand-new technology.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.

word	retrofit
definition	To furnish something with new or modified parts or equipment that was optional or unavailable at the time of manufacture.
eg_sentence	The office building has been retrofitted with air-conditioning, but the result has been a mixed success.
explanation	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during World War II, when weapons technology was advancing at an intense pace and planes and ships were becoming outdated even before their construction was complete, and the only solution was to retrofit the completed craft with the brand-new technology.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.
IPA	ˈrɛtroʊˌfɪt

Retrofitting Retrofit Technology Furnish Modified Parts Equipment Optional