cir·​ro·​stra·​tus ˌsir-ō-ˈstrā-təs How to pronounce cirrostratus (audio) -ˈstra- How to pronounce cirrostratus (audio)
: a fairly uniform high thin cloud layer darker than cirrus and often covering the entire sky see cloud illustration

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Example Sentences

Recent Examples on the Web The three main types are cirrus, cirrostratus and cirrocumulus. Anna Kaufman, USA TODAY, 17 July 2022 High clouds are classified as either cirrus, cirrostratus, or cirrocumulus. Catherine Zuckerman, National Geographic, 24 Apr. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cirrostratus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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Word History


New Latin

First Known Use

circa 1803, in the meaning defined above

Time Traveler
The first known use of cirrostratus was circa 1803

Dictionary Entries Near cirrostratus

Cite this Entry

“Cirrostratus.” Dictionary, Merriam-Webster, Accessed 6 Oct. 2022.

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