noun
pentagon
PEHN-tuh-guhn
noun
1
A five-sided, five-angled shape.
"The children drew a pentagon in art class using a ruler and protractor."
name
1
The five-sided headquarters building of the U.S. Department of Defense, or the department itself.
"The Pentagon announced new troop deployments on Friday."
How to Use Pentagon
Learner’s notesIn plain EnglishA five-sided shape, or (capitalized) the US military headquarters.
Word Forms
pentagons plural
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The children drew a _____ in art class using a ruler and protractor.
Etymology
From Greek pentágōnon, from pénte ("five") + gōnía ("angle").