Pentagon meaning

pĕntə-gŏn
(geometry) A polygon with five sides and five angles.
noun
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The headquarters of the United States of America's Department of Defense.
pronoun
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The definition of a pentagon is a figure with five straight sides and five angles, or a building near Washington D.C. that serves as the headquarters of the Department of Defense.

The five-sided shape of a road sign used for school advance warning signs is an example of a pentagon.

The headquarters of the Department of Defense is an example of the Pentagon.

noun
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A polygon with five sides and five angles.
noun
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2
A plane figure with five angles and five sides.
noun
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A polygon having five sides.
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A five-sided building near Washington DC, containing the US Department of Defense and the offices of the US Armed Forces. Used with the.
noun
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the Pentagon
  • a five-sided building in Arlington, Va., in which the main offices of the U.S. Department of Defense are located; hence, the U.S. military establishment
idiom
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Idioms and Phrasal Verbs

the Pentagon

Origin of pentagon

  • 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

  • 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