second classOur editors are putting together more complete content — check back in about 20 minutessecond class名詞 · 1形容詞 · 1second class — noun名詞1. the second-highest group or category1.名詞釋義the second-highest group or category例句She traveled in second class on the train.second class — adjective形容詞1 解釋1. of inferior quality or status1.形容詞釋義of inferior quality or status例句He felt he was treated as a second-class citizen.