名詞 retrofit:

1. a component or accessory added to something after it has been manufactured
2. the act of adding a component or accessory to something that did not have it when it was manufactured

動詞 retrofit:

1. provide with parts, devices, or equipment not available or in use at the time of the original manufacture
2. fit in or on an existing structure, such as an older house
3. substitute new or modernized parts or equipment for older ones

ret.ro.fit

v.（動詞）
ret.ro.fit.ted,ret.ro.fit.ting,ret.ro.fits
v.tr.（及物動詞）
To provide (a jet, an automobile, a computer, or a factory, for example) with parts, devices, or equipment not in existence or available at the time of original manufacture.
以改進型設備裝備：為（例如噴氣機，汽車，計算機或工廠）提供在初始制造階段不存在或不能得到的部件、設備或裝備
To install or fit (a device or system, for example) for use in or on an existing structure, especially an older dwelling.
作改型翻新：在現存的結構內或其上（尤其是較老的住所）安裝或裝設（設備或系統(tǒng)）
v.intr.（不及物動詞）
To fit into or onto equipment already in existence or service.
改進：對已存在或正在使用的設備內部或外部進行安裝配備
To substitute new or modernized parts or systems for older equipment:
裝備：用新的或現代化的部件或系統(tǒng)代替較老的裝備：
例句：
an industrial plant that was retrofitting to meet new safety regulations.
正在重新裝備工業(yè)企業(yè)以滿足適應新的安全規(guī)則

n.（名詞）
Something that has been retrofitted or that has undergone retrofitting.
改進：已經或正在經受裝備的東西
An instance of modernizing or expanding with new or modified parts, devices, systems, or equipment:
翻新：用新的或改造過的部件、設備、系統(tǒng)或裝備來實行現代化或進行擴建的事例：
例句：
a retrofit for the heating system.
供熱系統(tǒng)的改型翻新

adj.（形容詞）
Relating to or being a retrofit:
翻新的：關于或作為翻新的：
例句：
a retrofit kit for the homeowner; an energy-saving retrofit program; a large retrofit market.
房主的改建用的工具；節(jié)能改型方案；巨大的裝備翻新市場

【引伸】
ret.rofit.table
adj.（形容詞）
ret.rofit.ter
n.（名詞）