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a polygon having five sides
1. the five-sided building in Arlington, Virginia, that houses the headquarters of the US Department of Defense
2. the military leadership of the US
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
the pentagonal building near Washington, D.C., in Virginia, that is the headquarters of the US Department of Defense. In the broad sense, the term refers to the US Department of Defense, which exercises an enormous influence on US policy.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
A polygon with five sides.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.