Definitions

1. adjective

Allowing or characterized by the passage of fluids or gases through small openings or pores.

“The porous sponge soaked up water quickly.”

2. adjective

Having or showing small openings or pores, especially on the skin or surface of something.

“The skin of the apple was slightly porous.”

3. noun

A part of a rock or stone with small openings or pores, especially one that contains minerals.

“The porous rock formation was an important source of minerals.”

4. noun

A small opening or hole in a rock or stone, especially one that contains minerals.

“The porous outcropping was visible in the cliff face.”