Definition of porous
1a
: possessing or full of pores
b
: containing vessels
hardwood is porous
2a
: permeable to fluids
b
: permeable to outside influences
3
: capable of being penetrated
porous national boundaries
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Merriam-Webster unabridged
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Time Traveler for porous
The first known use of porous was in the 14th century
See more words from the same century