pentagon
n
1 [C] geometric figure with five sides and angles 五角形; 五邊形.
2 the Pentagon
(a) [sing] the five-sided building near Washington that is the headquarters of the US Department of Defence and the US armed forces 五角大樓(美國國防部辦公處).
(b) [Gp] the leaders of the US armed forces 美國三軍首腦
a spokesman for the Pentagon 美國國防部發(fā)言人.