backsideKK [ˋbæˏksaɪd] /ˈbæˌksaɪd/名詞1屁股、臀部口語He slipped on the ice and landed right on his backside.他在冰上滑倒,直接一屁股坐在地上。2背面、後側The serial number is printed on the backside of the device.序號印在這台裝置的背面。