porosity

noun

po·​ros·​i·​ty pə-ˈrä-sə-tē 

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

Speck agrees, adding that while high versus low porosity doesn’t exclusively determine frizziness, there are also many clients that fall somewhere in the middle of the spectrum—and this is especially true, as Clifford notes, if hair is color-treated. —Conçetta Ciarlo, Vogue, 1 Apr. 2026

Then there’s density (how many strands per square inch) and porosity (how readily hair absorbs moisture). —Allison Palmer, Miami Herald, 26 Mar. 2026

Other factors also matter, including density (how many strands grow per square inch) and porosity (how easily hair absorbs moisture). —Allison Palmer, Kansas City Star, 12 Mar. 2026

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

Word History

First Known Use

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

Rhymes for porosity

• atrocity
• ferocity
• monstrosity
• pomposity
• precocity
• schistosity
• velocity
• verbosity
• viscosity
• animosity
• curiosity
• generosity

Kids Definition

porosity

noun

po·​ros·​i·​ty pə-ˈräs-ət-ē 

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- 

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