# thermopause

> English word · Noun

## Definitions
1. The boundary between the thermosphere and the exosphere in a planetary atmosphere.

## Etymology
From thermo- + -pause.

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