Definition of thunderhead
: a rounded mass of cumulus or cumulonimbus cloud often appearing before a thunderstorm
Examples of thunderhead in a Sentence
A thunderhead was forming to the west.
Recent Examples of thunderhead from the Web
Off in the distance were puffy, juvenile thunderheads on the northeast horizon.
Lightning flashes sometimes occur at the tops of thunderheads, at elevations of 50,000 feet or higher.
Those thunderheads massing on the horizon let loose only a weak drizzle.
In El Niño conditions, sea surface temperatures in the Pacific Ocean become unusually warm and tall thunderheads, known as cumulonimbus clouds, form over the water.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thunderhead'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of thunderhead
THUNDERHEAD Defined for English Language Learners
Definition of thunderhead for English Language Learners
: a very large cloud appearing before a thunderstorm
THUNDERHEAD Defined for Kids
Definition of thunderhead for Students
: a rounded mass of dark cloud with white edges often appearing before a thunderstorm
Learn More about thunderhead
Seen and Heard
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