ETYM Cf. French infiltration.
The downward movement of water through a soil in response to gravity and capillary suction.
A process in which a military force moves as individuals (or small groups) through enemy positions without detection.
The passage of water into the soil. The rate of absorption of surface water by soil (the infiltration capacity) depends on the intensity of rainfall, the permeability and compactness of the soil, and the extent to which it is already saturated with water. Once in the soil, water may pass into the bedrock to form ground water.