pen·ta·gon
noun/ˈpentəɡən/
/ˈpentəɡɑːn/
- [countable] (geometry) a flat shape with five straight sides and five angles
enlarge image五边形；五角形 - the Pentagon[singular] the building near Washington DC that is the headquarters of the US Department of Defense and the military leaders
五角大楼（指美国国防部） - a spokesman for the Pentagon
美国国防部发言人
- a spokesman for the Pentagon
Word Originlate 16th cent.: via Latin from Greek pentagōnon, neuter (used as a noun) of pentagōnos ‘five-angled’.