what is infiltration definition
Infiltration is the process by which water on the ground surface enters the soil. Infiltration rate in soil science is a measure of the rate at which soil is able to absorb rainfall or irrigation. It is measured in inches per hour or millimeters per hour.nfiltration (Noun). The act or process of infiltrating, as of water into a porous substance, or of a fluid into the cells of an organ or part of the body. infiltration (Noun). The substance which has entered the pores or cavities of a body.