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
The Entity was a sentient artificial intelligence program capable of infiltrating any operating system – i.e., controlling the world.
—
Peter Rainer, Christian Science Monitor, 22 May 2025
Also in the first film, Ethan infiltrates a secure vault at CIA headquarters in Langley, VA, which was supposed to be monitored by William Donloe (Rolf Saxon).
—Todd Gilchrist, Variety, 22 May 2025
That includes artificial intelligence, which has infiltrated the workplace, from job applications and interviews to even mentorship.
—Suzanne Blake, MSNBC Newsweek, 22 May 2025
In the absence of such measures, illicit gold will further infiltrate global markets and fund war and criminal gangs.
—Sasha Lezhnev, Foreign Affairs, 19 May 2025
See All Example Sentences for infiltrate
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Peter Rainer, Christian Science Monitor, 22 May 2025
Also in the first film, Ethan infiltrates a secure vault at CIA headquarters in Langley, VA, which was supposed to be monitored by William Donloe (Rolf Saxon).
—Todd Gilchrist, Variety, 22 May 2025
That includes artificial intelligence, which has infiltrated the workplace, from job applications and interviews to even mentorship.
—Suzanne Blake, MSNBC Newsweek, 22 May 2025
In the absence of such measures, illicit gold will further infiltrate global markets and fund war and criminal gangs.
—Sasha Lezhnev, Foreign Affairs, 19 May 2025
See All Example Sentences for infiltrate
Cite this Entry
“Infiltrate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infiltrate. Accessed 29 May. 2025.
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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