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countable and uncountable, plural infiltrations
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.
(hydrology, soil science) process by which water on the ground surface enters the soil.
The substance which has entered the pores or cavities of a body. quotations examples
calcareous infiltrations filling the cavities
1784, Richard Kirwan, Elements of Mineralogy
The act of secretly entering a physical location and/or organization. quotations examples
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.
2019, Peter Hartcher, “Power and Paranoia: Why the Chinese government aggressively pushes beyond its borders”, in The Sydney Morning Herald