n.
A closed plane figure bounded by three or more line segments.
polygonal po·lyg'o·nal (pə-lĭg'ə-nəl) adj.
polygonally po·lyg'o·nal·ly adv.
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.