# permeability

/pɝˌmiəˈbɪɫɪti/ (US) · /pˌɜːməbˈɪlɪti/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/permeability
Updated: 2026-05-19

## Definition

the ability of a material to allow something like water or gas to pass through it. It is often used to describe how easily a liquid moves through soil or rock.

For teachers: the property of a material that allows the passage of a fluid or gas through its pores or interstices. Often used in geology to describe the capacity of a rock to transmit fluids.

## Examples

- The high permeability of the sand allows water to flow through it easily.
- Engineers must test the permeability of the soil before deciding where to build the new foundation.
- The geological survey revealed that the aquifer's permeability was significantly higher than previously estimated, suggesting a much greater potential for water extraction during the dry season.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.