infiltrate

verb in·fil·trate \ in-ˈfil-ˌtrāt , ˈin-(ˌ)fil- \

Definition of infiltrate

infiltrated; infiltrating
transitive verb
1 :to cause (something, such as a liquid) to permeate something by penetrating its pores or interstices
2 :to pass into or through (a substance) by filtering or permeating
3 :to pass (troops) singly or in small groups through gaps in the enemy line
4 :to enter or become established in gradually or unobtrusively usually for subversive purposes
  • the intelligence staff had been infiltrated by spies
intransitive verb
:to enter, permeate, or pass through a substance or area by filtering or by insinuating gradually

infiltrate

noun

infiltration

play \ˌin-(ˌ)fil-ˈtrā-shən\ noun

infiltrative

play \ˈin-(ˌ)fil-ˌtrā-tiv, in-ˈfil-trə-\ adjective

infiltrator

play \in-ˈfil-ˌtrā-tər, ˈin-(ˌ)fil-\ noun

Examples of infiltrate in a Sentence

  1. The gang was infiltrated by undercover agents.

  2. Attempts to infiltrate undercover agents into the gang have failed.

  3. Water can easily infiltrate the soil.

Recent Examples of infiltrate from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infiltrate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of infiltrate

1758

infiltrate Synonyms


Medical Dictionary

1

infiltrate

verb in·fil·trate \ in-ˈfil-ˌtrāt , ˈin-(ˌ) \

medical Definition of infiltrate

infiltrated; infiltrating
transitive verb
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
intransitive verb
:to enter, permeate, or pass through a substance or area

2

infiltrate

noun

medical Definition of infiltrate

: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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