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

Examples of cirrostratus in a Sentence

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 examples are programmatically compiled from various online sources to illustrate current usage of the word 'cirrostratus.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 21 Jun. 2024.

Kids Definition


cir·​ro·​stra·​tus ˌsir-ō-ˈstrāt-əs How to pronounce cirrostratus (audio) -ˈstrat- How to pronounce cirrostratus (audio)
: a fairly even high cloud layer that is darker than cirrus

More from Merriam-Webster on cirrostratus

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