Thesaurus.com
Dictionary.com
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

When Patriot Front members filed a lawsuit against the infiltrator accusing him of “malicious doxxing,” they relied on federal law and invasion of privacy and computer fraud statutes.

From Seattle Times • Nov. 16, 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

He considered that perhaps they were just checking him out, making sure he wasn’t an FBI infiltrator, but as the weeks went by, C.P. ached with disappointment.

From "The Best of Enemies" by Osha Gray Davidson




Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "infiltrator" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com