American English

Definition of perpendicular adjective from the Oxford Advanced American Dictionary



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  1. 1perpendicular (to something) (technology) 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, that makes use of vertical lines and wide arches
See the Oxford Advanced Learner's Dictionary entry: perpendicular

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