land·mark/`lændˏmɑrk; ˈlændmɑːk/ n [C] 1 something that helps you recognize where you are, such as a famous building 陆标,地标 2 a very important event, change, or discovery in the development of something 〔某事物发展过程中的〕里程碑; 重大转折: a landmark in the history of aviation 航空史上的里程碑