cosmology

1 of 2

noun

plural cosmologies
1
a
: a branch of metaphysics that deals with the nature of the universe
b
: a theory or doctrine describing the natural order of the universe
2
: a branch of astronomy that deals with the origin, structure, and space-time relationships of the universe
also : a theory dealing with these matters

cosmologic

2 of 2

adjective

cos·​mo·​log·​ic
¦käz-mə-¦lä-jik
: of or relating to cosmology

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Cosmology and Star Trek

Most religions and cultures include some kind of cosmology to explain the nature of the universe. In modern astronomy, the leading cosmology is still the Big Bang theory, which claims that the universe began with a huge explosion that sent matter and energy spreading out in all directions. One reason why fans watch Star Trek is for the various cosmologies depicted in the show, including different conceptions of space, time, and the meaning of life.

Examples of cosmology in a Sentence

Recent Examples on the Web
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Noun
And that those who carry both principles in a single body, who have always carried both, are not aberrations of this cosmology. Vogue, 1 June 2026 In Ancient Greek cosmology, Chaos could represent the primeval universe that existed before anything else, or the deepest realms of Tartarus, the underworld. Literary Hub, 18 May 2026 The hunt is now on for more lensing clusters like XLSSC 122, and if they are found so early in the universe's history, a major revision of cosmology may be on the cards. Robert Lea, Space.com, 29 June 2026 The 37-year-old artist has gained international attention for her darkly humorous videos and installations that explore Indigenous identity and cosmologies, ecology, futurism, and the line between history and myth. Harrison Jacobs, ARTnews.com, 29 Apr. 2026 See All Example Sentences for cosmology

Word History

Etymology

Noun

New Latin cosmologia, from Greek kosmos — see cosmic + New Latin -logia -logy

Adjective

cosmology + -ic or -ical

First Known Use

Noun

circa 1656, in the meaning defined at sense 1a

Time Traveler
The first known use of cosmology was circa 1656

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Cite this Entry

“Cosmology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmology. Accessed 7 Jul. 2026.

Kids Definition

cosmology

noun
plural cosmologies
: a branch of astronomy that deals with the beginning, structure, and space-time relationships of the universe

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