infiltrate
verb
in·fil·trate
ˈin-(ˌ)fil-ˌtrāt 
in-ˈfil-
in-ˈfil-
infiltrated; infiltrating
1
: to enter or become established in gradually or unobtrusively usually for subversive purposes
the intelligence staff had been infiltrated by spies
2
: to pass (troops) singly or in small groups through gaps in the enemy line
3
: to pass into or through (a substance) by filtering or permeating
4
: to cause (something, such as a liquid) to permeate something by penetrating its pores or interstices
: to enter, permeate, or pass through a substance or area by filtering or by insinuating gradually
infiltrate
noun
Examples of infiltrate in a Sentence
The gang was infiltrated by undercover agents.
Attempts to infiltrate undercover agents into the gang have failed.
Water can easily infiltrate the soil.
Recent Examples on the Web
While not part of driving updates, Gemini will infiltrate the Maps search with a new ask option.
—
Sasha Lekach, Forbes, 31 Oct. 2024
Trump’s grand plan: Tapping Musk to regulate the regulators
Sam Butler, a writer and filmmaker, discusses Elon Musk’s elaborate planning to infiltrate U.S. politics.
—The Hill, 30 Oct. 2024
The Venezuelan government is rounding up criminals and depositing them at the U.S.-Mexico border to infiltrate us.
—Alejandro Puyana, TIME, 30 Oct. 2024
How did the bed bugs get inside the Kwik Trip?
Neither Kwik Trip representatives nor county officials were sure of how the bed bugs infiltrated the location.
—Maia Pandey, Journal Sentinel, 28 Oct. 2024
See all Example Sentences for infiltrate 
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Sasha Lekach, Forbes, 31 Oct. 2024
Trump’s grand plan: Tapping Musk to regulate the regulators
Sam Butler, a writer and filmmaker, discusses Elon Musk’s elaborate planning to infiltrate U.S. politics.
—The Hill, 30 Oct. 2024
The Venezuelan government is rounding up criminals and depositing them at the U.S.-Mexico border to infiltrate us.
—Alejandro Puyana, TIME, 30 Oct. 2024
How did the bed bugs get inside the Kwik Trip?
Neither Kwik Trip representatives nor county officials were sure of how the bed bugs infiltrated the location.
—Maia Pandey, Journal Sentinel, 28 Oct. 2024
See all Example Sentences for infiltrate
Dictionary Entries Near infiltrate
Cite this Entry
“Infiltrate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infiltrate. Accessed 1 Dec. 2024.
Copy CitationKids Definition
infiltrate
verb
in·fil·trate
in-ˈfil-ˌtrāt
ˈin-(ˌ)fil-
ˈin-(ˌ)fil-
infiltrated; infiltrating
1
: to pass into or through by filtering
2
: to enter or become established gradually or secretly
Medical Definition
infiltrate
1 of 2 verb
in·fil·trate
in-ˈfil-ˌtrāt
ˈin-(ˌ)
ˈin-(ˌ)
infiltrated; infiltrating
1
: to cause (as a liquid) to permeate something by penetrating its pores or interstices
infiltrate tissue with a local anesthetic
2
: to pass into or through (a substance) by filtering or permeating
: to enter, permeate, or pass through a substance or area
infiltrate
2 of 2 noun
: something that passes or is caused to pass into or through something by permeating or filtering
especially
: a substance that passes into the bodily tissues and forms an abnormal accumulation
a lung infiltrate
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