third-classBrE /ˌθɜːd ˈklɑːs/ 🔊NAmE /ˌθɜːrd ˈklæs/ 🔊 adjective(especially in the past) connected with the cheapest and least comfortable way of travelling on a train, ship, etc. 三等的（尤指旧时火车座位、轮船舱位等）(in the US) connected with the class of mail used to send advertisements, etc. 第三类的（美国邮件等级） [only before noun] used to describe the lowest standard of degree given by a British university 第三等的（英国大学学位）(disapproving) (of people 人) less important than other people 第三等的；卑微的◆They are treated as third-class citizens. 他们被当成三等公民对待。🔊🔊▸ third class BrE /ˌθɜːd ˈklɑːs/ 🔊NAmE /ˌθɜːrd ˈklæs/ 🔊 adverb◆to travel third class乘坐三等舱