Infiltration

Infiltration may refer to:

• Infiltration (HVAC), a heating, ventilation, and air conditioning term for air leakage into buildings
• Infiltration (hydrology), downward movement of water through soil
• Infiltration/Inflow, leakage of groundwater into sanitary sewers
• Infiltration (medical), the diffusion or accumulation of substances not normal to it or in amounts in excess of the normal
• Infiltration (zine), a popular urban exploration zine/website created by Jeff Chapman (Ninjalicious)
• Infiltration tactics, tactics developed by the German army in 1917 that broke the trench-warfare stalemate on the western front
• An attempt to sneak across a border, or into a guarded place
• Entryism, a political tactic aimed at dissolving potentially harmful organizations or political adversaries
• Espionage, an attempt to infiltrate a target organization
• Urban exploration, exploring parts of towns etc which are normally off-limits
• Infiltration, a book by Albert Speer