[ koz-mohs, -muhs ]
/ ˈkɒz moʊs, -məs /
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noun, plural cos·mos, cos·mos·es for 2, 4.

the world or universe regarded as an orderly, harmonious system.
a complete, orderly, harmonious system.
order; harmony.
any composite plant of the genus Cosmos, of tropical America, some species of which, as C. bipannatus and C. sulphureus, are cultivated for their showy ray flowers.
(initial capital letter)Also Kos·mos. Aerospace. one of a long series of Soviet satellites that have been launched into orbit around the earth.



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Origin of cosmos

First recorded in 1150–1200; Middle English, from Greek kósmos “order, form, arrangement, the world or universe”
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for cosmos

British Dictionary definitions for cosmos (1 of 2)

/ (ˈkɒzmɒs) /


the world or universe considered as an ordered system
any ordered system
harmony; order
plural -mos or -moses any tropical American plant of the genus Cosmos, cultivated as garden plants for their brightly coloured flowers: family Asteraceae (composites)

Word Origin for cosmos

C17: from Greek kosmos order, world, universe

British Dictionary definitions for cosmos (2 of 2)

/ (ˈkɒzmɒs) /


astronautics any of various types of Soviet satellite, including Cosmos 1 (launched 1962) and nearly 2000 subsequent satellites
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

Scientific definitions for cosmos

[ kŏzməs, kŏzmōs′ ]

The universe, especially when considered as an orderly and harmonious whole.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.