<span class="searchmatch">retrofitters</span> plural of <span class="searchmatch">retrofitter</span>...
From retrofit + -er. <span class="searchmatch">retrofitter</span> (plural <span class="searchmatch">retrofitters</span>) One who retrofits....
previously available or installed. retrofittable retrofitted (adjective) <span class="searchmatch">retrofitter</span> retrofitting (noun) retrogreen seismic retrofit refit (transitive) to...