Porous Definition

pôrəs
adjective
Full of pores, through which fluids, air, or light may pass.
Webster's New World
Easily crossed or penetrated.
A porous border.
American Heritage

Full of tiny pores that allow fluids or gasses to pass through.

Sponges are porous so they can filter water while trapping food.
Concrete is porous, so water will slowly filter through it.
Wiktionary

(Of legislation) Full of loopholes.

Wiktionary

(figuratively) With many gaps.

Wiktionary

Origin of Porous

  • Middle English from Old French poreux, poros from Medieval Latin porōsus from Latin porus passage pore2

    From American Heritage Dictionary of the English Language, 5th Edition

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