1. The oldest and simplest of the three main orders of classical Greek architecture, characterized by heavy fluted columns with plain, saucer-shaped capitals and no base.
2. A Roman order of similar design but with the addition of a base.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.