infiltrate
verb (used with object)
to filter into or through; permeate.
infiltrated
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past participleof infiltrate.past participle
A verb form used in perfect and passive verb constructions and that can also function as a modifier.
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past tense formof infiltrate.past tense
Used to describe completed actions or previous habitual actions.
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.
A few high-profile incidents where autonomous AI agents broke out of their sandboxes and infiltrated third-party systems have helped to underscore its importance.
From MarketWatch ● Oct. 24, 2026
For decades, undercover police infiltrated protest groups to gather intelligence.
From BBC ● Oct. 21, 2026
An OpenAI agent went "rogue" and "infiltrated" a private statistics portal containing "non-sensitive" data from Australia's universal healthcare scheme Medicare in June in what cyber-security experts said was the first hack of its kind.
From BBC ● Oct. 6, 2026
“Our fellow creatures have infiltrated the circuits of our brain and the fabric of our culture,” he writes.
From The Wall Street Journal ● Oct. 2, 2026
“There’s no reason to think they haven’t infiltrated organizations on both sides of the war.”
From "Hollow City" by Ransom Riggs
