adjective
- not allowing liquids or gases to pass through
Examples
- The raincoat is made of impermeable fabric that keeps you completely dry.
- Clay soil is relatively impermeable to water.
- The scientist tested whether the membrane was impermeable to certain gases.
- Rubber gloves provide an impermeable barrier against chemicals.
- The basement walls were sealed with an impermeable coating.
- Oil cannot penetrate the impermeable rock layer.