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
Elon Musk, Jeff Bezos and Mark Zuckerberg Among Several Tech CEOs Filling VIP Seats at Trump's Inauguration
DOGE has worked to infiltrate other federal agencies as well.
—
Rachel Raposas, People.com, 3 Feb. 2025
These apps likely abused the Core Media framework by triggering corrupted files, enabling attackers to infiltrate devices.
—Kurt Knutsson, Cyberguy Report, Fox News, 1 Feb. 2025
The third and final season follows Gi-Hun (Lee Jung-Jae) after losing his best friend in the game and being driven to utter despair by The Front Man (Lee Byung-hun), who hides his true identity to infiltrate the gam.
—Peter White, Deadline, 30 Jan. 2025
Sleeping Dogs follows Wei Shen, an undercover Chinese-American police officer infiltrating a Triad organization.
—Thomas G. Moukawsher, Newsweek, 30 Jan. 2025
See all Example Sentences for infiltrate 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Rachel Raposas, People.com, 3 Feb. 2025
These apps likely abused the Core Media framework by triggering corrupted files, enabling attackers to infiltrate devices.
—Kurt Knutsson, Cyberguy Report, Fox News, 1 Feb. 2025
The third and final season follows Gi-Hun (Lee Jung-Jae) after losing his best friend in the game and being driven to utter despair by The Front Man (Lee Byung-hun), who hides his true identity to infiltrate the gam.
—Peter White, Deadline, 30 Jan. 2025
Sleeping Dogs follows Wei Shen, an undercover Chinese-American police officer infiltrating a Triad organization.
—Thomas G. Moukawsher, Newsweek, 30 Jan. 2025
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 9 Feb. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share