cosmology
noun
cos·mol·o·gy
käz-ˈmä-lə-jē 
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
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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
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
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.
—Frannie Comstock, Encyclopedia Britannica, 26 May 2026
That cosmology shaped daily life, from farming cycles to ceremonies.
—Lauren Mowery, Forbes.com, 26 May 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
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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.
—Frannie Comstock, Encyclopedia Britannica, 26 May 2026
That cosmology shaped daily life, from farming cycles to ceremonies.
—Lauren Mowery, Forbes.com, 26 May 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
See All Example Sentences for cosmology
Cite this Entry
“Cosmology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmology. Accessed 3 Jun. 2026.
Copy CitationKids Definition
cosmology
noun
cos·mol·o·gy
käz-ˈmäl-ə-jē
plural cosmologies
: a branch of astronomy that deals with the beginning, structure, and space-time relationships of the universe
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