infiltration meaning

[ ˌinfil'treiʃən ] Pronunciation:   "infiltration" in a sentence
  • Noun: infiltration  `infil'treyshun
    1. A process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection) 
    2. The slow passage of a liquid through a filtering medium
      "the infiltration of seawater through the lava"
      - percolation

    Derived forms: infiltrations

    See also: infiltrate

    Type of: filtration, incursion, penetration

    Encyclopedia: Infiltration Infiltration, The set trap

  • [Architecture]

    The seepage or flow of air into a room or space through cracks around windows, under doors, etc.


    In a concrete sewer pipe laid in soil, the volume of groundwater that enters the pipeline system.

  • [Defence]
    1. The movement through or into an area or territory occupied by either friendly or enemy troops or organizations.
    The movement is made, either by small groups or by individuals, at extended or irregular intervals.
    When used in connection with the enemy, it implies that contact is avoided.
    2. In intelligence usage, placing an agent or other person in a target area in hostile territory.
    Usually involves crossing a frontier or other guarded line.
    Methods of infiltration are: black (clandestine); grey (through legal crossing point but under false documentation); and white (legal).
    (JP 3-05.1)

  • [Medicine]
    a : the act or process of infiltrating
    b : something that infiltrates ‹anesthetic drug infiltration›
    2 : an abnormal bodily condition produced or characterized by infiltration


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  1. there are infiltration center on lava and agglomerates.
  2. a loss in volume will occur if infiltration takes place.
  3. the project was being whittled down into a guerrilla infiltration.
  4. local areas of infarction or infiltration can sometimes be demonstrated.
  5. infiltration of fat may be quite serious, because the fat displaces functioning cells.

Related Words

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