# thunderhead

> English word · Noun · IPA /ˈθʌndɚˌhɛd/

## Definitions
1. The top portion of a cumulonimbus cloud, which tends to be flattened or fibery in appearance, and may be indicative of thunderstorm activity.

## Etymology
From thunder + head.

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