Definition of vertical noun from the Oxford Advanced Learner's Dictionary

     

    vertical

     noun
    noun
    BrE BrE//ˈvɜːtɪkl//
     
    ; NAmE NAmE//ˈvɜːrtɪkl//
     
     
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  1. 1(also the vertical) a vertical line or position synonym perpendicular The wall is several degrees off the vertical.
  2. 2(business) an area of business or field of activity This year we saw significant growth outside our core verticals. Can you identify different verticals in your market to which your product might also appeal? We had actually identified the health care industry as a vertical we wanted to enter way back in 2004.
  3. Word Origin mid 16th cent. (in the sense ‘directly overhead’): from French, or from late Latin verticalis, from vertex ‘whirlpool, crown of a head, vertex’, from vertere ‘to turn’.
See the Oxford Advanced American Dictionary entry: vertical