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
The wide-field view of Rubin could help confirm this, which would prompt revisions to the standard model of cosmology, or Lambda Cold Dark Matter (LCDM), a model built on a constant dark energy strength.
—
Robert Lea, Space.com, 20 June 2025
Later in her career, Thompson focused on cosmologies and astrological phenomena.
—Chadd Scott, Forbes.com, 18 June 2025
Their cosmology and ways of knowing were labeled savage.
—Karida L. Brown, Essence, 21 May 2025
Related article Two mysterious fast radio bursts originated from wildly different places in space
The inability to detect roughly half of the cosmos’ ordinary matter led to a decades-long cosmology struggle called the missing baryon problem.
—Ashley Strickland, CNN Money, 16 June 2025
See All Example Sentences for cosmology
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Robert Lea, Space.com, 20 June 2025
Later in her career, Thompson focused on cosmologies and astrological phenomena.
—Chadd Scott, Forbes.com, 18 June 2025
Their cosmology and ways of knowing were labeled savage.
—Karida L. Brown, Essence, 21 May 2025
Related article Two mysterious fast radio bursts originated from wildly different places in space
The inability to detect roughly half of the cosmos’ ordinary matter led to a decades-long cosmology struggle called the missing baryon problem.
—Ashley Strickland, CNN Money, 16 June 2025
See All Example Sentences for cosmology
Cite this Entry
“Cosmology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmology. Accessed 5 Jul. 2025.
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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