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porous (adj.)

late 14c., "full of pores," from Old French poros (14c., Modern French poreux), from Medieval Latin porosus; or directly from Latin porus "an opening" (see pore (n.)). Figurative use from 1640s.

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Definitions of porous from WordNet

porous (adj.)
full of pores or vessels or holes;
Synonyms: poriferous
porous (adj.)
able to absorb fluids;
compacting the soil to make it less porous
the partly porous walls of our digestive system
porous (adj.)
allowing passage in and out;
our unfenced and largely unpoliced border inevitably has been very porous
Synonyms: holey
From wordnet.princeton.edu