dark matter
noun
: nonluminous matter not yet directly detected by astronomers that is hypothesized to exist to account for various observed gravitational effects
Examples of dark matter in a Sentence
Recent Examples on the Web
Over the decades, the observatories on Kitt Peak have helped map dark matter, chart distant galaxies and train generations of astronomers.
—
Kenna Hughes-Castleberry, Space.com, 31 Oct. 2025
Interstellar is the area in between stars where dark matter resides.
—Paige Moore, AZCentral.com, 30 Oct. 2025
The big puzzles of today, including dark matter, dark energy, and the origin of the matter-antimatter asymmetry, could hardly have been fathomed at the time.
—Big Think, 28 Oct. 2025
Physicists have been on the quest for axions for decades because some possible variants of these particles might constitute most or all of the universe’s dark matter.
—Stephanie Pappas, Scientific American, 27 Oct. 2025
See All Example Sentences for dark matter
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.
Kenna Hughes-Castleberry, Space.com, 31 Oct. 2025
Interstellar is the area in between stars where dark matter resides.
—Paige Moore, AZCentral.com, 30 Oct. 2025
The big puzzles of today, including dark matter, dark energy, and the origin of the matter-antimatter asymmetry, could hardly have been fathomed at the time.
—Big Think, 28 Oct. 2025
Physicists have been on the quest for axions for decades because some possible variants of these particles might constitute most or all of the universe’s dark matter.
—Stephanie Pappas, Scientific American, 27 Oct. 2025
See All Example Sentences for dark matter
Cite this Entry
“Dark matter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20matter. Accessed 7 Nov. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share