# thundercloud

> English word · Noun

## Definitions
1. A large, dark cloud, usually a cumulonimbus, charged with electricity and producing thunder and lightning.
2. Something menacing and brooding.

## Etymology
From thunder + cloud.

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