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⇱ COSMOLOGICAL Definition & Meaning - Merriam-Webster

Dictionary Definition
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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
In cosmology itself, there has been quite a bit of progress in the past five years to develop the theoretical techniques to understand these three-dimensional data that have been gathered by new devices…. —👁 Image
Joseph Howlett, Scientific American, 16 June 2026 And that those who carry both principles in a single body, who have always carried both, are not aberrations of this cosmology. —👁 Image
Vogue, 1 June 2026 After rebelling against the authority of the Jade Emperor (the supreme deity in traditional Chinese cosmology), he is subdued by the Buddha and imprisoned beneath the Five Elements Mountain. —👁 Image
Frannie Comstock, Encyclopedia Britannica, 26 May 2026 That cosmology shaped daily life, from farming cycles to ceremonies. —👁 Image
Lauren Mowery, Forbes.com, 26 May 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

Rhymes for cosmology

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Cite this Entry

“Cosmology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmology. Accessed 17 Jun. 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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