from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A polygon having five sides and five interior angles.
- n. A five-sided building near Washington, D.C., containing the U.S. Department of Defense and the offices of the U.S. Armed Forces. Used with the.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A polygon with five sides and five angles.
from the GNU version of the Collaborative International Dictionary of English
- n. A plane figure having five angles, and, consequently, five sides; any figure having five angles.
from The Century Dictionary and Cyclopedia
- n. In geometry, a figure of five sides and five angles: if all the sides and all the angles are equal it is a regular pentagon.
- n. In fortification, a fort with five bastions.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the United States military establishment
- n. a five-sided polygon
- n. a government building with five sides that serves as the headquarters of the United States Department of Defense
Late Latin pentagōnum, from Greek pentagōnon : penta-, penta- + -gōnon, -gon.(American Heritage® Dictionary of the English Language, Fourth Edition)
From French pentagone or late Latin pentagonum, from Ancient Greek πεντάγωνον, noun use of the neuter of the adjective πεντάγωνος ("five-angled"), from πέντε ("five") + -γωνος ("angled"). (Wiktionary)