Retrofit Definition

rĕtrō-fĭt
retrofits, retrofitted, retrofitting
verb
To modify with a retrofit.
Webster's New World
To outfit (a device, vehicle, building, or system) with newly developed or previously unavailable parts or equipment.
Retrofit cars with new safety features.
American Heritage
To install or fit (a device or system, for example) for use in or on an existing structure, especially an older dwelling.
American Heritage

To add or substitute new parts or components to some device, structure etc., that were not previously available; to modernize.

Wiktionary

To fix an older version (older versions) as part of the same process of fixing the newest version; to backport.

The bug was so bad that we had to retrofit our patch to the last three releases, as well as the newest release.
Wiktionary
noun
A change in design, construction, or equipment, as of an aircraft or machine tool already in operation, in order to incorporate later improvements.
Webster's New World
An instance of retrofitting.
A retrofit for the heating system.
American Heritage
Something that has been retrofitted.
Wiktionary
adjective
Of, relating to, or being a retrofit.
Wiktionary

Other Word Forms of Retrofit

Noun

Singular:
retrofit
Plural:
retrofits

Origin of Retrofit

  • Blend of retro- and refit

    From Wiktionary

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retrofit