porosity

noun

po·​ros·​i·​ty pə-ˈrä-sə-tē How to pronounce porosity (audio)
pȯ-
plural porosities
1
a
: the quality or state of being porous
b
: the ratio of the volume of interstices of a material to the volume of its mass
2
: pore

Examples of porosity in a Sentence

Recent Examples on the Web
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.
Traditional models tend to average porosity into a single value, which hides critical details. Sujita Sinha, Interesting Engineering, 16 Jan. 2026 However, this type of furniture is not well-suited for outdoor use during the winter months due to the material's porosity. Timothy Dale, Better Homes & Gardens, 13 Jan. 2026 Because of its porosity, wood will easily absorb this liquid. Melissa Epifano, The Spruce, 1 Jan. 2026 Protein treatments combat structural weakness, excessive porosity, and that limp, lifeless texture that even the best moisturizers can't fix. Jailynn Taylor, Allure, 31 Dec. 2025 See All Example Sentences for porosity

Word History

First Known Use

14th century, in the meaning defined at sense 1a

Time Traveler
The first known use of porosity was in the 14th century

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Cite this Entry

“Porosity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/porosity. Accessed 28 Jan. 2026.

Kids Definition

porosity

noun
po·​ros·​i·​ty pə-ˈräs-ət-ē How to pronounce porosity (audio)
pōr-ˈäs-
pȯ-ˈräs-
plural porosities
: the quality or state of being porous

Medical Definition

porosity

noun
po·​ros·​i·​ty pə-ˈräs-ət-ē, pō-, pȯ- How to pronounce porosity (audio)
plural porosities
1
a
: the quality or state of being porous
b
: the ratio of the volume of interstices of a material to the volume of its mass
2
: pore

More from Merriam-Webster on porosity

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