pentagon

n. five-sided building that is located in Washington D.C. (USA) and serves as United States Department of Defense headquarters

n. five sided geometric shape

In geometry, a pentagon is any five-sided polygon. A pentagon may be simple or self-intersecting. The internal angles in a simple pentagon total 540°.
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Noun
1. a government building with five sides that serves as the headquarters of the United States Department of Defense
(hypernym) government building
2. the United States military establishment
(hypernym) bureaucracy, bureaucratism
(classification) military, armed forces, armed services, military machine, war machine

Noun
1. a five-sided polygon
(hypernym) polygon, polygonal shape

n. Pentagon, five sided geometric shape; five-sided building serving as United States Department of Defense headquarters

n. pentagon, five sided geometric shape