The definition of porous is a material that is able to easily absorb fluids or allow liquid to pass through.(adjective)
A material through which liquid can easily pass is an example of a porous material.
See porous in Webster's New World College Dictionary
Origin: ME < ML porosus < L porus, pore
See porous in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old French poreux, poros
Origin: , from Medieval Latin porōsus
Origin: , from Latin porus, passage; see pore2.
Learn more about porous