[ strey-tuh s, strat-uh s ]
/ ˈstreɪ təs, ˈstræt əs /

noun, plural stra·ti [strey-tahy, strat-ahy] /ˈstreɪ taɪ, ˈstræt aɪ/.

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

Definition for strati (2 of 2)


a combining form representing stratum in compound words: stratiform.

Origin of strati- Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for strati (1 of 2)


combining form

indicating stratum or stratastratiform; stratigraphy

British Dictionary definitions for strati (2 of 2)


/ (ˈstreɪtəs) /

noun plural -ti (-taɪ)

a grey layer cloudCompare cirrus (def. 1), cumulus

Word Origin for stratus

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

Science definitions for strati


[ strătəs, strātəs ]

Plural strati (strătī, strā)

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.