The headquarters of the United States Department of Defense, a pentagonal building located near Washington, D.C.; often used metonymically to refer to the department itself

five-pointed star; pentagram

Wujiaochang neighborhood of Shanghai, located in Yangpu district near Fudan University

a five-sided shape or figure

the headquarters of the United States Department of Defense; commonly used in Taiwan to refer to the building located in Arlington, Virginia

A metaphor for things not going well or encountering bad luck. Historically refers to an old belief that the fifth day of a cycle falling on the [[角|角|jue2]] mansion and the sixth day falling on the [[张|張|zhang1]] mansion were unlucky days for business or travel.