# quadrilateral

> English word · Noun · IPA /ˌkwɒdɹɪˈlætəɹəl/ · frequency rank #61,741

## Definitions
1. A polygon with four sides.
2. An area defended by four fortresses supporting each other.

## Etymology
Learned borrowing from Latin quadrilaterus + -al.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/quadrilateral