N-PROPER [NOUN n]五角大楼(美国国防部办公大楼);美国国防部The Pentagon is the main building of the US Defense Department, in Washington. The US Defense Department is often referred to as the Pentagon . 五角大楼(美国国防部办公大楼);美国国防部
...a news conference at the Pentagon.
在五角大楼召开的记者招待会
The Pentagon says bad weather is hampering the allied air raids.