Pentagon Definition
pĕntə-gŏn
noun
A plane figure with five angles and five sides.
Webster's New World
A five-sided building near Washington DC, containing the US Department of Defense and the offices of the US Armed Forces. Used with the.
American Heritage
pronoun
The headquarters of the United States of America's Department of Defense.
Wiktionary
Other Word Forms of Pentagon
Noun
Singular:
pentagonPlural:
pentagonsIdioms, Phrasal Verbs Related to Pentagon
- the Pentagon
Origin of Pentagon
From French pentagone or late Latin pentagonum, from Ancient Greek πεντάγωνον (pentagōnon), noun use of the neuter of the adjective πεντάγωνος (pentagōnos, “five-angled"), from πέντε (pente, “five") + -γωνος (-gōnos, “angled").
From Wiktionary
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Late Latin pentagōnium from Greek pentagōnon from neuter of pentagōnos pentagonal penta- penta- -gōnos angled –gon
From American Heritage Dictionary of the English Language, 5th Edition
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