高铁 gāotiě HSK4 high-speed rail Origin Definitions Defs Strokes Stroke Words Sentences Sents 高 gāo adjectivenoun abbreviation of 高速 gāosù high-speed; high speed moving or operating at a high rate of speed; fast-paced铁 鐵 tiě noun abbreviation of 铁路 鐵路 tiělù railroad railway or railroad; a transport line where steel tracks are laid on a roadbed for trains to run on