pentagon

Meanings

1. 1
   noun

   A flat shape with five straight sides and five angles.

   The pupils drew a pentagon in their geometry exercise.

2. 2
   name

   The headquarters of the US Department of Defense, or the department itself.

   The Pentagon announced new measures to strengthen security.

From Middle French pentagone, from Late Latin pentagōnum, from Ancient Greek πεντάγωνον (pentágōnon), noun use of the neuter of the adjective πεντάγωνος (pentágōnos, “five-angled”), from πέντε (pénte, “five”) + -γωνος (-gōnos, “angled”). Equivalent to penta- + -gon.

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