01 v. i. To enter by penetrating the pores or interstices of a substance; to filter into or through something.
imp. & p. p.
Infiltrated; p. pr. & vb. n.
Infiltrating
-
1.
To enter by penetrating the pores or interstices of a substance; to filter into or through something.“The water infiltrates through the porous rock.” — Addison.
-
2.
To enter secretly (into an organization, territory, etc.) for hostile purposes, such as spying or sabotage; as, the FBI infiltrated into the U. S. communist party's upper echelons; also used transitively; as, to infiltrate the opponent's organization; to infiltrate one's agents into a hostile country.