Definition of altostratus in English:

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Pronunciation: /ˌaltəʊˈstrɑːtəs/
Pronunciation: /ˌaltəʊˈstreɪtəs/


[mass noun]
Cloud forming a continuous uniform layer which resembles stratus but occurs at medium altitude (typically 2 to 7 km, 6,500 to 23,000 ft).
Example sentences
  • The grey layer looks like and should be an altostratus although the fronts look different in the tropical regions.
  • An altostratus cloud usually covers the whole sky and has a gray or blue-gray appearance.
  • Where enough light shows through cirrostratus clouds to create shadows, it does not with altostratus.


Late 19th century: from modern Latin alto- (from Latin altus 'high') + stratus.

Words that rhyme with altostratus

cirrostratus, nimbostratus, stratus

For editors and proofreaders

Line breaks: alto|stra¦tus

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