retro·fitBrE/ˈretrəʊfɪt/NAmE/ˈretroʊfɪt/verbpresent simple - I / you / we / theyretrofitBrE/ˈretrəʊfɪt/NAmE/ˈretroʊfɪt/present simple - he / she / itretrofitsBrE/ˈretrəʊfɪts/NAmE/ˈretroʊfɪts/past simpleretrofittedBrE/ˈretrəʊfɪtɪd/NAmE/ˈretroʊfɪtɪd/past participleretrofittedBrE/ˈretrəʊfɪtɪd/NAmE/ˈretroʊfɪtɪd/ -ing formretrofittingBrE/ˈretrəʊfɪtɪŋ/NAmE/ˈretroʊfɪtɪŋ/~sthtoputanewpieceofequipmentintoamachinethatdidnothaveitwhenitwasbuilt; toprovideamachinewithanewpart, etc.给机器设备装配(新部件);翻新;改型◆Voicerecorderswereretrofittedintoplanesalreadyinservice. 录音设备安在了正在服役的飞机上。◆Theyretrofittedtheplanewithimprovedseating. 他们在飞机上安装了经过改良的座椅。▸retro·fitnoun