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Definitions

infiltration

[in-fil-trey-shuhn] / ˌɪn fɪlˈtreɪ ʃən /






NOUN
seepage
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Russia shifted tactics in early 2025 toward infiltration, whereby small groups of soldiers are sent through gaps in Ukraine’s defensive lines.

From The Wall Street Journal • May 12, 2026

"We show that increased infiltration of T cells that are attacking tumor cells translates into a therapeutic benefit for patients with glioblastoma," said Chiocca, who is also a co-senior author of the study.

From Science Daily • Mar. 20, 2026

In a statement on Monday, Hezbollah said it detected "the infiltration of approximately 15 Israeli enemy helicopters" from the Syrian side of the border in eastern Lebanon, an area where Hezbollah holds sway.

From Barron's • Mar. 8, 2026

One tactic was by far the most effective: infiltration.

From Salon • Feb. 15, 2026

In July of that year, the committee announced a new round of investigations, but this time into something far more serious than the communist infiltration of Hollywood.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau




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