infiltration Meaning, Definition & Usage

  1. noun a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)
  2. noun the slow passage of a liquid through a filtering medium
    percolation.
    • the percolation of rainwater through the soil
    • the infiltration of seawater through the lava

WordNet

In`fil*tra"tion noun
Etymology
Cf. F. infiltration.
Definitions
  1. The act or process of infiltrating, as if water into a porous substance, or of a fluid into the cells of an organ or part of the body.
  2. The substance which has entered the pores or cavities of a body. Addison.
    Calcareous infiltrations filling the cavities. Kirwan.

Webster 1913