The meaning of POROUS is possessing or full of pores. How to use porous in a sentence.

If something is full of tiny holes or openings, you can describe it as porous. A sponge is porous, and if the border between countries is open for anyone to cross easily, it too can be called porous.

Something that is porous has many small holes, so liquid or air can pass through, especially…. Learn more.

Definition of porous adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

porous, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

Jan 20, 2026 · Adjective porous (comparative more porous, superlative most porous) Full of tiny pores that allow fluids or gasses to pass through.

Porous definition: Admitting the passage of gas or liquid through pores or interstices.

[more porous; most porous] 1 : having small holes that allow air or liquid to pass through porous rock a porous membrane/surface 2 : easy to pass or get through

porous /ˈpɔːrəs/ adj permeable to water, air, or other fluids having pores; poriferous easy to cross or penetrate: the porous border into Thailand, the most porous defence in the league Etymology: 14th …

Something that is porous has many small holes in it that water and air can pass through. The local limestone is so porous that all the rainwater immediately sinks below ground.