Admitting the passage of gas or liquid through pores or interstices.(adjective)
Easily crossed or penetrated.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "porous" in a sentence
"Clearly, there was an interview published in the "New York Times" today with the new defense minister of the newly formed Afghanistan government, where he said that Osama bin Laden is definitely in Tora Bora and he went on to tell these reporters that not only can he find hiding places in this very complicated maze structure, but that if he felt too much pressure from the United States, it would make easy access to what they described as the porous border with Pakistan."
"They find a nice comfy nesting place in porous materials like woods. anna Says:"
"The walls between Blake's fiction and reality remain porous as characters"