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infiltration

C2
Fairly common

Pronunciation

UK

  • /ˌɪnfɪltrˈeɪʃən/

US

  • /ˌɪnfɪlˈtreɪʃən/

Meanings

Noun

  1. secret entry into a place or group to gather information or gain influence

  2. the process of water or another fluid passing into or through a porous material

  3. the spread or deposit of fluid, cells, or another substance into body tissue

More meanings
  1. unauthorized penetration of a computer system or network

Beyond the definition

Imagine a secret agent slipping past guards into an enemy base – that's infiltration! It means entering a place or group secretly, often to gather information or cause disruption. Think of water slowly seeping into cracks in the foundation of a building; it's not crashing through, but subtly getting inside.

Infiltration isn't always about spies and espionage, though. A new idea can infiltrate your thinking, meaning it gradually takes hold. Or, an invasive plant species might infiltrate a local ecosystem, slowly taking over. The key is the secret and often gradual nature of the entry. You might read about infiltration in political thrillers or hear about it when discussing security breaches.

Examples

  1. 1

    Military context

    The army increased patrols after reports of enemy infiltration near the border.

  2. 2

    Police investigation

    Police spent months planning the infiltration of the drug gang.

  3. 3

    Water damage

    Water infiltration through the roof caused serious damage to the upstairs rooms.

  4. 4

    Extremist ideas

    Teachers were concerned about the infiltration of extremist ideas into online student groups.

More examples
  1. 5

    Platform safety

    The platform introduced stricter checks to prevent the infiltration of fake accounts into private communities.

See also

Similar

Shades of meaning

Contrast

Used with (collocations)

  • enemy infiltration
  • infiltration of a group
  • prevent infiltration
  • covert infiltration

Word family

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Forms and spellings

2 forms open this card.

Main spelling

  • infiltrationnoun

Forms

  • infiltrationspluralnoun