Added 10 October 2026
pentagon
/ˈpɛn.təˌɡɑn/ noun
Latin root: pentagōnum Wiktionary
noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about pentagon at Wordnik → Where our words come from →
- A government building with five sides that serves as the headquarters of the United States Department of Defense.
- The United States military establishment.
- A five-sided polygon.
Origin
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.
From Wiktionary, via Kaikki.org (CC BY-SA)