Definition of porous
1a : possessing or full of poresb : containing vessels hardwood is porous
2a : permeable to fluidsb : permeable to outside influences
3 : capable of being penetrated porous national boundaries
Examples of porous in a Sentence
The country has a porous border.
a cleaner that should not be used on porous surfaces
Recent Examples of porous from the Web
The defense was especially porous in the interior for the first two quarters (remember, the Warriors missed 15 shots within two feet of the rim), but when the buzzer sounded the Cavs were only down eight.
Egypt has a long, porous border with Libya, which officials say is a route for smuggling in arms and fighters.
Egypt also has long complained that weapons smuggled across the porous desert border with Libya have reached militants operating on its soil.
Consequently its relatively slim 21-story tower sits on a broad, wonderfully porous two-story pedestal.
But opponents have argued that list is both short and porous.
If this ad hoc effort could succeed, imagine how porous our current cryptosystems must seem to the folks at Fort Meade, whose resources are expansive and whose expertise is unquestioned.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'porous'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of porous
POROUS Defined for English Language Learners
Definition of porous for English Language Learners
: having small holes that allow air or liquid to pass through
: easy to pass or get through
POROUS Defined for Kids
Definition of porous for Students
1 : full of small holes porous wood
2 : capable of absorbing liquids porous paper
Medical Definition of porous
1: possessing or full of pores porous bones
2: permeable to fluids
Seen and Heard
What made you want to look up porous? Please tell us where you read or heard it (including the quote, if possible).