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
Authorities say militants use the porous border with Libya to smuggle fighters and weapons into Egypt.
Dump it on a smooth counter or cutting board (avoid surfaces that are porous or have grout).
Identify your wood The more porous the wood, the tougher your job will be.
On a Sunday at Kauffman Stadium, the combination of sinkers, a tight strike zone and a porous defense turned a sound decision into a disastrous one.
Libya is also appealing for help to secure its porous southern border, which is some 4,000 kilometers (2,500) miles long.
Osteoporosis, a disease that causes bones to become brittle, porous and prone to breaks, affects millions of Americans each year.
Britain’s departure will be a considerable blow, but the union has other problems, including an aggressive Russia, a migrant crisis, porous borders and, importantly, an ambivalent if not hostile President Trump.
Pakistan shares a porous border with Iran, and the two sides agreed to boost security last month after gunmen killed 10 Iranian border guards. _
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
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