al·​to·​stra·​tus | \ ˌal-tō-ˈstrā-təs How to pronounce altostratus (audio) , -ˈstra- How to pronounce altostratus (audio) \
plural altostrati\ ˌal-​tō-​ˈstrā-​ˌtī How to pronounce altostrati (audio) , -​ˈstra-​ \

Definition of altostratus

: a fairly uniform mid-altitude layer of gray cloud darker than cirrostratus — see cloud illustration

Examples of altostratus in a Sentence

Recent Examples on the Web Mid-level clouds are usually gray and are identified as either altocumulus, altostratus, or nimbostratus. Catherine Zuckerman, National Geographic, "Clouds, explained," 24 Apr. 2019

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

First Known Use of altostratus

1890, in the meaning defined above

History and Etymology for altostratus

New Latin, from Latin altus + New Latin -o- + stratus

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Time Traveler for altostratus

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The first known use of altostratus was in 1890

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Cite this Entry

“Altostratus.” Dictionary, Merriam-Webster, Accessed 23 Oct. 2020.

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