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Meaning of arris

ar•ris

Pronunciation: (ar'is), [key]
— n. Archit.
  1. a sharp ridge, as between adjoining channels of a Doric column.
  2. the line, ridge, or hip formed by the meeting of two surfaces at an exterior angle. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.