# upper mantle

> English word · Noun

## Definitions
1. The layer of Earth's interior located beneath the crust and extending to a depth of 410 kilometers.
2. Any similar layer of an exoplanet.

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