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.
A polygon with five sides and five angles.
A plane figure with five angles and five sides.
A polygon having five sides.
A five-sided building near Washington DC, containing the US Department of Defense and the offices of the US Armed Forces. Used with the.
- 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
Idioms and Phrasal Verbs
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 Ï€ÎµÎ½Ï„Î¬Î³Ï‰Î½Î¿Î½ (pentagÅnon), noun use of the neuter of the adjective Ï€ÎµÎ½Ï„Î¬Î³Ï‰Î½Î¿Ï‚ (pentagÅnos, “five-angled"), from Ï€ÎÎ½Ï„Îµ (pente, “five") + -Î³Ï‰Î½Î¿Ï‚ (-gÅnos, “angled").