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.
What sets this mask apart is the brand’s capsule technology, which delivers argan oil, amino acids, and keratin-like proteins to improve porosity from within, smooth split ends, and reinforce the cuticle. Christa Joanna Lee, Allure, 26 Feb. 2026 Colorist Lindsay Wolf notes that results can vary depending on porosity, previous color, moisture levels, and frequency of use. Iman Balagam, Vogue, 20 Feb. 2026 In six‑figure jewelry and hardware, porosity is fatal. Lilian Raji, Forbes.com, 30 Jan. 2026 This new technique is for wash-n-go moisture layering irrespective of porosity, texture, and hair type. Essence, 28 Jan. 2026 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 Feb. 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

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