infiltration — English Dictionary

Noun

1. The act or process of infiltrating, as of water into a porous substance, or of a fluid into the cells of an organ or part of the body.

   Usage

   • Countable
   • Uncountable

2. The act or process of infiltrating, as of water into a porous substance, or of a fluid into the cells of an organ or part of the body. process by which water on the ground surface enters the soil.

   Usage

   • Countable
   • Uncountable

3. The substance which has entered the pores or cavities of a body.

   Usage

   • Countable
   • Uncountable

   Examples

   calcareous infiltrations filling the cavities

4. The act of secretly entering a physical location and/or organization.

   Usage

   • Countable
   • Uncountable

   Examples

   More examples (1)

   No one should be under any illusions about the objective of the Communist Party leadership: it’s long-term, systematic infiltration of social organisations, media and government. By the time China’s infiltration of Australia is readily apparent, it will be too late.

Noun

1. a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)

   Broader terms

   penetrationincursion

2. the slow passage of a liquid through a filtering medium

   Synonyms

   percolation

   Broader terms

   filtration

   Examples

   the percolation of rainwater through the soil

   the infiltration of seawater through the lava