PER'MEABLE, adjective [Latin permeo; per and meo, to pass or glide.] That may be passed through without rupture or displacement of its parts, as solid matter; applied particularly to substances that admit the passage of fluids. Thus cloth, leather, wood are permeable to water and oil; glass is permeable to light, but not to water.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI