The Pentagon is the main building of the US Defense Department, in Washington. The US Defense Department is often referred to as the Pentagon .
...a news conference at the Pentagon...
N-PROPER : the N , N n
PENTAGON
Meaning of PENTAGON in English
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006