# square kilometre

> English word · Noun

## Definitions
1. Standard unit of area, symbol km², equal to the area of a square whose sides are one kilometre long; 10⁶ square metres.

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