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[strey-tuh s, strat-uh s] /ˈstreɪ təs, ˈstræt əs/
noun, plural strati
[strey-tahy, strat-ahy] /ˈstreɪ taɪ, ˈstræt aɪ/ (Show IPA)
a cloud of a class characterized by a gray, horizontal layer with a uniform base, found at a lower altitude than altostratus, usually below 8000 feet (2400 meters).
Origin of stratus
1795-1805; < Latin strātus; see stratum Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for stratus


noun (pl) -ti (-taɪ)
a grey layer cloud Compare cirrus (sense 1), cumulus
Word Origin
C19: via New Latin from Latin: strewn, from sternere to extend
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for stratus

"a low layer of cloud," 1803, from Latin stratus "a spreading," from stratus, past participle of sternere (see stratum).

Online Etymology Dictionary, © 2010 Douglas Harper
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stratus in Science
  (strāt'əs, strā'təs)   
Plural strati (strāt'ī, strā'tī)
A diffuse, grayish cloud that often produces drizzle and is formed primarily in altitudes no higher than 2,000 m (6,560 ft). A stratus cloud close to the ground or water is called fog. See illustration at cloud.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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