- 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.
The Pentagon is also shaped like a pentagon.
Origin of pentagonClassical Latin pentagonum ; from Classical Greek pentagōnon: see penta- and amp; -gon
- A polygon with five sides and five angles.
- Pentagon A five-sided building near Washington DC, containing the US Department of Defense and the offices of the US Armed Forces. Used with the.
Origin of pentagonLate Latin pentagōnium, from Greek pentagōnon, from neuter of pentagōnos, pentagonal : penta-, penta- + -gōnos, angled; see –gon.
top: mathematical figure
bottom: the Pentagon
- (geometry) A polygon with five sides and five angles.
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”).
- the headquarters of the United States of America's Department of Defense.