monorail

noun
🔊/ˈmɒnəʊreɪl/
🔊/ˈmɑːnəʊreɪl/
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  1. [uncountable] a railway system in which trains travel along a track consisting of a single metal bar, usually one placed high above the ground单轨铁路(通常为高架)Topics Transport by bus and trainc2
  2. [countable] a train used in a monorail system 单轨列车