1.pass into or through, often by overcoming resistance;
The bullet penetrated her chest
2.come to understand
3.become clear or enter one's consciousness or emotions;
It dawned on him that she had betrayed him
4.enter a group or organization in order to spy on the members;
The student organization was infiltrated by a traitor
5.make one's way deeper into ar through;
The hikers did not manage to penetrate the dense forest
6.insert the penis into the vagina or anus of;
Did the molester penetrate the child?
7.spread or diffuse through;
An atmosphere of distrust has permeated this administration