Definition of perpendicular adjective from the Oxford Advanced Learner's Dictionary

     

    perpendicular

     adjective
    adjective
    BrE BrE//ˌpɜːpənˈdɪkjələ(r)//
     
    ; NAmE NAmE//ˌpɜːrpənˈdɪkjələr//
     
    Architectural styles
     
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  1. 1perpendicular (to something) (specialist) forming an angle of 90° with another line or surface; vertical and going straight up Are the lines perpendicular to each other? The staircase was almost perpendicular (= very steep).
  2. 2Perpendicular (architecture) connected with a style of architecture common in England in the 14th and 15th centuries Culture The Perpendicular style in architecture was marked by large windows, vertical lines, and ceiling patterns in stone called fan vaulting. An example of this style is the chapel of King's College, Cambridge. compare Decorated style, Early English See related entries: Architectural styles
  3. Word Origin late Middle English (as an adverb meaning ‘at right angles’): via Old French from Latin perpendicularis, from perpendiculum ‘plumb line’, from per- ‘through’ + pendere ‘to hang’.Extra examples an almost perpendicular staircase two mutually perpendicular directions The staircase was almost perpendicular.
See the Oxford Advanced American Dictionary entry: perpendicular

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