pentagon

Noun
  1. A government building with five sides that serves as the headquarters of the United States Department of Defense (synset 103918615)
    is an instance of: government building - a building that houses a branch of government
  2. The United States military establishment (synset 108224016)
    referred to in: armed forces, armed services, military, military machine, war machine - the military forces of a nation
    is a type of: bureaucracy, bureaucratism - nonelective government officials
  3. A five-sided polygon (synset 113904858)
    is a type of: polygon, polygonal shape - a closed plane figure bounded by straight sides

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