1. the quality or state of being pervious; the ability to be penetrated or passed through
Usage: formal

Examples

• The perviousness of the soil allowed water to drain quickly after the storm.
• Scientists tested the perviousness of different rock samples to determine groundwater flow.
• The membrane’s perviousness to certain gases made it useful for filtration.
• Engineers considered the perviousness of the concrete when designing the foundation.
• The perviousness of the fabric to air made it ideal for summer clothing.
• Researchers studied the perviousness of cell walls to various nutrients.