Meaning of supercolumniation

su•per•co•lum•ni•a•tion

Pronunciation: (s"pur-ku-lum"nē-ā'shun), [key]
— n. Archit.
  1. the placing of one order of columns above another.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.