infiltrate

4 definitions • 2 examples

to secretly become part of a group in order to get information or to influence the way that group thinks or behaves:

A journalist managed to infiltrate the powerful drug cartel.

to move slowly into a substance, place, system, or organization:

infiltrate (into) At about this time the new ideas about "corporate management" had begun to infiltrate (into) local government.

to become a member of a group or organization to secretly gather information about its activities

(of water) to flow slowly down into the earth from the earth's surface, for example, through cracks in rocks