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
Geologists turned to tiny bubbles to investigate the dynamics driving magma flow beneath Hawaii’s volcanoes as the country’s islands drift northwest on a tectonic plate.
—
Paul Smaglik, Discover Magazine, 15 May 2025
The Axial Seamount, as the volcano is known, is inflating with magma and causing earthquakes where two giant tectonic plates — the Pacific and Juan de Fuca plates — are spreading apart.
—Ashley Strickland, CNN Money, 11 May 2025
Meanwhile, other researchers have proposed that K2-18b isn’t brimming with water, but with magma, instead.
—Sara Hashemi, Smithsonian Magazine, 17 Apr. 2025
According to research on the plates, parts of the rift are separating at a rate of .3 inches per year due to the movement of magma deep below the surface.
—Katie Nadworny, Travel + Leisure, 14 May 2025
See All Example Sentences for magma
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Paul Smaglik, Discover Magazine, 15 May 2025
The Axial Seamount, as the volcano is known, is inflating with magma and causing earthquakes where two giant tectonic plates — the Pacific and Juan de Fuca plates — are spreading apart.
—Ashley Strickland, CNN Money, 11 May 2025
Meanwhile, other researchers have proposed that K2-18b isn’t brimming with water, but with magma, instead.
—Sara Hashemi, Smithsonian Magazine, 17 Apr. 2025
According to research on the plates, parts of the rift are separating at a rate of .3 inches per year due to the movement of magma deep below the surface.
—Katie Nadworny, Travel + Leisure, 14 May 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 9 Jun. 2025.
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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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