Dictionary.com
definitions

altostratus

[ al-toh-strey-tuh s, -strat-uh s ]
/ ˌæl toʊˈstreɪ təs, -ˈstræt əs /

noun, plural al·to·stra·tus. Meteorology.

a cloud of a class characterized by a generally uniform gray sheet or layer, lighter in color than nimbostratus and darker than cirrostratus: of medium altitude, about 8000–20,000 feet (2450–6100 meters).

Nearby words

  1. alton,
  2. alton towers,
  3. altona,
  4. altoona,
  5. altophobia,
  6. altrices,
  7. altricial,
  8. altrincham,
  9. altruism,
  10. altruist

Origin of altostratus

First recorded in 1890–95; alto- + stratus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for altostratus

altostratus

/ (ˌæltəʊˈstreɪtəs, -ˈstrɑː-) /

noun plural -ti (-taɪ)

a layer cloud at an intermediate height of about 2400 to 6000 metres (8000 to 20 000 feet)
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 altostratus

altostratus

[ ăl′tō-străt′əs ]

Plural altostrati (ăl′tō-străt′ī′)

A mid-altitude cloud that extends in flat, smooth sheets or layers of varying thickness. Altostratus clouds generally form between 2,000 and 6,100 m (6,560 and 20,000 ft) and often produce long, steady rain showers. See illustration at cloud.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.