from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To pass (troops, for example) surreptitiously into enemy-held territory.
- transitive v. To penetrate with hostile intent: infiltrate enemy lines; terrorists that had infiltrated the country.
- transitive v. To enter or take up positions in gradually or surreptitiously, as for purposes of espionage or takeover: infiltrated key government agencies with spies.
- transitive v. To cause (a liquid, for example) to permeate a substance by passing through its interstices or pores.
- transitive v. To permeate (a porous substance) with a liquid or gas.
- intransitive v. To gain entrance gradually or surreptitiously.
- n. One that infiltrates, especially an abnormal substance that accumulates gradually in cells or body tissues.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To surreptitiously penetrate, enter or gain access.
- v. To cause a fluid to pass through a substance by filtration.
- v. To send soldiers through gaps in the enemy line.
- v. To move from a vein, remaining in the body.
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To enter by penetrating the pores or interstices of a substance; to filter into or through something.
- intransitive v. To enter secretly (into an organization, territory, etc.) for hostile purposes, such as spying or sabotage; ; also used transitively.
- transitive v. To penetrate gradually; -- sometimes used reflexively.
from The Century Dictionary and Cyclopedia
- To pass by filtration; percolate through pores or interstices.
- To pass into or through the pores or interstices of; filter into or through.
- n. That which infiltrates; specifically, in pathology, the substance which passes into the tissues to form a morbid accumulation, as the fat of fatty infiltration.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. pass through an enemy line; in a military conflict
- v. enter a group or organization in order to spy on the members
- v. cause (a liquid) to enter by penetrating the interstices
- v. pass into or through by filtering or permeating
Sorry, no etymologies found.