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retro-engine
retroact
retroaction
retroactive
retroactive inhibition
retrocede
retrochoir
retrofire
retrofit
retroflection
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retroflexion
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retrofit

ret·ro·fit [ réttrō fìt ]


transitive verb  (past and past participle ret·ro·fit·ted, present participle ret·ro·fit·ting, 3rd person present singular ret·ro·fits)
Definition:
 
1. modify something with new parts: to modify something such as a machine or a building by adding newly developed parts or devices that were not available when the machine or building was made
older cars retrofitted with catalytic converters

2. install new parts: to install newly developed parts or devices into a machine or building, that were not available when the machine or building was made
retrofit a microchip in the alarm system



noun  (plural ret·ro·fits)
Definition:
 
1. new part, or something with one: something that has been equipped with a newly developed component, or such a component designed for something that is already in use

2. process of adding new part: the process or an instance of modifying something such as a machine or a building by adding newly developed parts or devices

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