Infiltrate - Definition
infiltrate
v 1: cause (a liquid) to enter by penetrating the interstices
2: enter a group or organization in order to spy on the members;
"The student organization was infiltrated by a traitor" [syn:
infiltrate, penetrate]
3: pass into or through by filtering or permeating; "the
substance infiltrated the material"
4: pass through an enemy line; in a military conflict [syn:
infiltrate, pass through]