American English

Definition of vertical adjective from the Oxford Advanced American Dictionary

      

    vertical

     adjective
    adjective
    NAmE//ˈvərt̮ɪkl//
     
     
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  1. 1(of a line, pole, etc.) going straight up or down from a level surface or from top to bottom in a picture, etc. synonym perpendicular the vertical axis of the graph The cliff was almost vertical. There was a vertical drop to the ocean. compare horizontal
  2. 2having a structure in which there are top, middle, and bottom levels a vertical flow of communication
  3. NAmE//ˈvərt̮ɪkli//
     
    adverb The cliffs rose up vertically out of the water.
See the Oxford Advanced Learner's Dictionary entry: vertical