ペンタゴン

noun

the Pentagon; U.S. Department of Defense

Used as a proper noun or metonym in news and political contexts for the U.S. Department of Defense, and sometimes by extension its headquarters.

• ペンタゴンは新あたらしい防ぼう衛えい戦せん略りゃくを発はっ表ぴょうした。

  The Pentagon announced a new defense strategy.

noun

pentagon; five-sided polygon

Rare as a Japanese term for the shape; 五角形 is the normal word in mathematics and everyday explanation.

See also: 五角形

• 図ず形けいとしての「ペンタゴン」は、普ふ通つうは五ご角かく形けいと言いう。

  The shape called a “pentagon” is normally called 五角形 in Japanese.