What does "infiltration" mean?

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.

What is a synonym for "infiltration"?

Common synonyms include: percolation, absorbency, absorbent, absorption, access, admission.

Pronounced //ɪnfɪlˈtɹeɪʃən//.

//ɪnfɪlˈtɹeɪʃən// noun

noun ·Moderate ·High school level

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. countable, uncountable
2
a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection) wordnet
3
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. countable, uncountable
4
the slow passage of a liquid through a filtering medium wordnet
5
The substance which has entered the pores or cavities of a body. countable, uncountable
"calcareous infiltrations filling the cavities"

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6
The act of secretly entering a physical location and/or organization. countable, uncountable
"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."