Meaning & use
infiltration
The act of secretly entering an organization, place, or group in order to gain information or influence it.
See it in a sentence
The spy's infiltration of the enemy camp gave the army crucial intelligence.
Slow infiltration of water through the soil eventually reached the underground pipes.
A note on using this word
Common in espionage and military contexts, but also used literally for liquids or gases entering a material.
Words with a similar meaning
penetration
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. noun
The gradual movement of a liquid or gas into a substance or area.
Infiltration of rainwater into the basement caused the mold problem.
Make it your own
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