1. The act or process of infiltrating, as of water into a porous substance, of a fluid into the cells of an organ or part of the body, or of persons into a hostile organization. [ 1913 Webster +PJC ]
2. The substance which has entered the pores or cavities of a body. Addison. [ 1913 Webster ]
Calcareous infiltrations filling the cavities. Kirwan. [ 1913 Webster ]
Fatty infiltration. (Med.) See under Fatty. -- Infiltration gallery, a filter gallery. [ 1913 Webster ]