1
: a widely distributed mineral consisting of hydrous calcium sulfate that is used especially as a soil amendment and in making plaster of paris
2
: drywall
Examples of gypsum in a Sentence
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Cores under the Mediterranean Sea itself revealed minerals such as gypsum and rock salt that are commonly deposited when salty water dries up.
—
Elizabeth Fernandez, Big Think, 4 Sep. 2025
The gypsum dunes replicate crusty Martian sediment, while frozen ridges offer lessons in ice-regolith interactions.
—Neetika Walter, Interesting Engineering, 22 Aug. 2025
This product is usually applied to gardens with a broadcast spreader at a rate of around ½ pound of gypsum per square foot of space.
—Lauren Landers, Better Homes & Gardens, 12 Aug. 2025
The journey, while short, does a great job of showcasing the ecosystem that is created when two landscapes meet—in this case, desert scrub brush and gypsum dunes.
—Evie Carrick, Travel + Leisure, 5 Aug. 2025
See All Example Sentences for gypsum
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Elizabeth Fernandez, Big Think, 4 Sep. 2025
The gypsum dunes replicate crusty Martian sediment, while frozen ridges offer lessons in ice-regolith interactions.
—Neetika Walter, Interesting Engineering, 22 Aug. 2025
This product is usually applied to gardens with a broadcast spreader at a rate of around ½ pound of gypsum per square foot of space.
—Lauren Landers, Better Homes & Gardens, 12 Aug. 2025
The journey, while short, does a great job of showcasing the ecosystem that is created when two landscapes meet—in this case, desert scrub brush and gypsum dunes.
—Evie Carrick, Travel + Leisure, 5 Aug. 2025
See All Example Sentences for gypsum
Cite this Entry
“Gypsum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gypsum. Accessed 18 Sep. 2025.
Copy CitationKids Definition
gypsum
noun
gyp·sum
ˈjip-səm 
: a colorless mineral that consists of calcium sulfate occurring in crystals or masses and that is used especially as a soil improver and in making plaster of paris
Medical Definition
gypsum
noun
gyp·sum
ˈjip-səm
: a widely distributed mineral CaSO4·2H2O consisting of hydrous calcium sulfate that is used especially as a soil amendment and in making plaster of paris
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