re·new·a·ble/rɪ`nuəbḷ; rɪˈnjuːəbəl/ adj 1 something that is renewable can be replaced at the same speed that it is used up 可再生的: a renewable energy source 再生性能源 2 a renewable contract, ticket etc can be made to continue after the time limit on it has been reached 〔合同、票子等〕可延期［续期］的