Definition

A shape with five sides and five angles, or a specific building in Washington, D.C. that houses the U.S. Department of Defense.

Example

The Pentagon is an important symbol of the U.S. military.

Conversation

Have you ever seen the Pentagon in person?

No, I haven’t, but I’ve read a lot about it.

It's such a unique building with its five sides.

I would love to visit and learn more about what goes on inside.

Synonyms & Antonyms

Root Explanation

Pentagon → It is formed from "penta-" (from Greek "pente", meaning five) and "gonia" (from Greek "gonia", meaning angle). The word "pentagon" refers to a shape with five angles.

Memory Tip

Think of 'five' ('penta-') angles ('gonia') coming together to form a shape — that's what a pentagon is.

Visually Confused Words