perpendicular
/perp ndikyoolr/ • adjective 1 at an angle of 90° to a given line, plane, or surface. 2 at an angle of 90° to the ground; vertical. 3 (Perpendicular) of the latest stage of English Gothic church architecture (late 14th to mid 16th centuries), characterized by broad arches and elaborate fan vaulting. • noun a perpendicular line. — DERIVATIVES perpendicularity noun perpendicularly adverb. — ORIGIN Latin perpendicularis, from perpendiculum ‘plumb line’.
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