- a building in Arlington, Virginia, having a plan in the form of a regular pentagon, containing most U.S. Defense Department offices.
- the U.S. Department of Defense; the U.S. military establishment.
Origin of pentagon
Related formspen·tag·o·nal [pen-tag-uh-nl] /pɛnˈtæg ə nl/, adjectivepen·tag·o·nal·ly, adverbsub·pen·tag·o·nal, adjective
Examples from the Web for pentagon
Pentagon leaders agree to a person that the U.S. war against ISIS is succeeding.
“I think it is important to say it is too soon to judge success or failure,” said Col. Steven Warren, a Pentagon spokesman.
Granted, James is in an office in the Pentagon, and not on the front lines.
The Pentagon said Faal served in the Air Force for seven years, during which time he became a U.S. citizen.The Shadowy U.S. Veteran Who Tried to Overthrow a Country|Jacob Siegel|January 6, 2015|DAILY BEAST
But the program is just six weeks long, the Pentagon admitted Monday.Pentagon Insider on New Plan to Fight ISIS: ‘Of Course It’s Not Enough’|Nancy A. Youssef|January 6, 2015|DAILY BEAST
In rounders the bases are five in number and the field a pentagon in shape.Base-Ball|John M. Ward
Its Roman name was Anderida, the walls enclosing an irregular oval, the castle within being a pentagon, with towers at the angles.England, Picturesque and Descriptive|Joel Cook
Apparently he got his communication from the Pentagon about the time I got mine.Sense from Thought Divide|Mark Irvin Clifton
Pentagon -um: a five-sided figure with five equal or unequal angles.Explanation of Terms Used in Entomology|John. B. Smith
Can you fold a square piece of paper in such a way that with a single fold it forms a pentagon?My Discovery of England|Stephen Leacock
British Dictionary definitions for pentagon (1 of 2)
Derived Formspentagonal (pɛnˈtæɡənəl), adjective
British Dictionary definitions for pentagon (2 of 2)
Science definitions for pentagon
Related formspentagonal adjective (pĕn-tăg′ə-nəl)
Culture definitions for pentagon (1 of 2)
Culture definitions for pentagon (2 of 2)
A polygon having five sides.