cosmological constant
noun
: a constant term used in the relativistic equations for gravity to represent a repulsive force which may account in part for the rate of expansion of the universe
Examples of cosmological constant in a Sentence
Recent Examples on the Web
If the universe is filled with enough dark energy — or what in Einstein’s day was called a cosmological constant — then over time, its push should cause space to expand.
—
Shalma Wegsman, Quanta Magazine, 30 Mar. 2026
This was a direct contradiction of the leading hypothesis, which was that dark energy was the cosmological constant and, therefore, unchanging.
—Keith Cooper, Space.com, 28 Dec. 2025
And there will be no Big Rip, because dark energy appears to be a cosmological constant.
—Ethan Siegel, Big Think, 3 Oct. 2025
This model aligns well with the new data and points to a negative underlying cosmological constant.
—Sujita Sinha, Interesting Engineering, 2 Oct. 2025
See All Example Sentences for cosmological constant
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Shalma Wegsman, Quanta Magazine, 30 Mar. 2026
This was a direct contradiction of the leading hypothesis, which was that dark energy was the cosmological constant and, therefore, unchanging.
—Keith Cooper, Space.com, 28 Dec. 2025
And there will be no Big Rip, because dark energy appears to be a cosmological constant.
—Ethan Siegel, Big Think, 3 Oct. 2025
This model aligns well with the new data and points to a negative underlying cosmological constant.
—Sujita Sinha, Interesting Engineering, 2 Oct. 2025
See All Example Sentences for cosmological constant
Cite this Entry
“Cosmological constant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmological%20constant. Accessed 4 Apr. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
