Pentagon cultural definition

An immense five-sided building in Virginia, just outside Washington, D.C., that serves as headquarters for the Department of Defense.

• The term is often used to refer to the Department of Defense or the military: “The Pentagon agreed today to submit the modified weapons plan to the president.”
• The Pentagon was severely damaged by the September 11 attacks.

A polygon having five sides.

• The Pentagon is a huge five-sided building near Washington, D.C., that contains offices of the Department of Defense.