• 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.
  • The substance which has entered the pores or cavities of a body.
  • The act of secretly entering a physical location and/or organization.


  • From Middle English infiltracioun, from Medieval Latin infiltrātiōnem, infiltrātiō.
  • Morphologically infiltrate + -ion

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