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Definitions

infiltrator

[in-fil-trey-ter, in-fil-trey-] / ˈɪn fɪlˌtreɪ tər, ɪnˈfɪl treɪ- /
NOUN
intruder
Synonyms
STRONGEST
STRONG


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.

They had to go with the “selfie cruise” narrative, which meant they had to treat them with basic decency because they couldn’t pass them off as some evil infiltrator.

From Slate • Sep. 29, 2025

In Silverman’s telling, the filmmaker, Joris Ivens, a Dutchman working in the United States, is already an undercover infiltrator for Soviet interests when the Spanish Civil War breaks out in 1936.

From New York Times • Nov. 30, 2023

“I just had the worst infiltrator the org has ever seen,” Brown wrote.

From Seattle Times • Aug. 8, 2023

Ukrainian agencies, Ton-That said, have used the app to confirm the identities of people at military checkpoints and to check whether a Ukrainian is a possible Russian infiltrator or saboteur.

From Washington Post • Apr. 15, 2022

“Should I—there’s no way you could be an infiltrator, is there? Can I trust you?”

From "Among the Hidden" by Margaret Peterson Haddix