definition of
infiltrate

[1] #1 infiltrate v. cause (a liquid) to enter by penetrating the interstices. wn

[2] #2 infiltrate v. [penetrate] enter a group or organization in order to spy on the members; "The student organization was infiltrated by a traitor". wn

[3] #3 infiltrate v. pass into or through by filtering or permeating; "the substance infiltrated the material". wn

[4] #4 infiltrate v. [pass through] pass through an enemy line; in a military conflict. wn