Dictionary

thunderhead

noun thun·der·head \-ˌhed\

: a very large cloud appearing before a thunderstorm

Full Definition of THUNDERHEAD

:  a rounded mass of cumulus or cumulonimbus cloud often appearing before a thunderstorm

Examples of THUNDERHEAD

  1. A thunderhead was forming to the west.

First Known Use of THUNDERHEAD

1843
THUNDERHEAD Defined for Kids

thunderhead

noun thun·der·head \ˈthən-dər-ˌhed\

Definition of THUNDERHEAD for Kids

:  a rounded mass of dark cloud with white edges often appearing before a thunderstorm

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