2
: a thin pasty suspension (as of a precipitate in water)
3
: molten rock material within the earth from which igneous rock results by cooling
Examples of magma in a Sentence
Recent Examples on the Web
Li said similar technology is being used in Iceland to record how magma is moving in volcanoes.
—
Evan Bush, NBC news, 25 Sep. 2025
Lichtenberg thinks the atmosphere most likely bubbled up from the planet’s magma ocean.
—Elise Cutts, Scientific American, 23 Sep. 2025
These magmas, such as kimberlites, are responsible for bringing diamonds to the surface.
—Mrigakshi Dixit, Interesting Engineering, 23 Sep. 2025
One possibility is that the water on young Venus formed steam that wafted above the magma sea covering the newborn planet’s surface.
—Quanta Magazine, 15 Sep. 2025
See All Example Sentences for magma
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Evan Bush, NBC news, 25 Sep. 2025
Lichtenberg thinks the atmosphere most likely bubbled up from the planet’s magma ocean.
—Elise Cutts, Scientific American, 23 Sep. 2025
These magmas, such as kimberlites, are responsible for bringing diamonds to the surface.
—Mrigakshi Dixit, Interesting Engineering, 23 Sep. 2025
One possibility is that the water on young Venus formed steam that wafted above the magma sea covering the newborn planet’s surface.
—Quanta Magazine, 15 Sep. 2025
See All Example Sentences for magma
Cite this Entry
“Magma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magma. Accessed 28 Sep. 2025.
Copy CitationKids Definition
Medical Definition
magma
noun
mag·ma
ˈmag-mə 
1
: a crude mixture of mineral or organic matter in the state of a thin paste
2
: a suspension of a large amount of precipitated material (as in milk of magnesia) in a small volume of a watery vehicle
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