Definition
Something permeable allows liquids or gases to pass through it. Think of a sponge: water can easily flow through its holes. Permeable materials are the opposite of impermeable ones, which block passage. The key characteristic is the presence of interconnected pores or spaces. The more pores, the greater the permeability. Soil is permeable to water, allowing it to reach plant roots. It implies a degree of openness and accessibility for fluids. In essence, a permeable substance is one that allows passage.