infiltration

/ˌɪnfɪlˈtreɪʃən/
noun
  1. The act of secretly entering a place or group, especially to gain information or cause harm.
    • The spy's infiltration of the embassy took months of careful planning.
    • The movie is about the infiltration of a criminal gang by an undercover police officer.
    • The company discovered an infiltration of hackers into its computer network.
  2. The gradual spread or movement of something into a place or system.
    • Doctors are studying the infiltration of cancer cells into healthy tissue.
    • The infiltration of saltwater into the freshwater reservoir is a growing concern.
    • The infiltration of new ideas into the traditional community happened slowly.
  3. The process of a liquid slowly passing through a material or into the ground.
    • Proper drainage prevents the infiltration of water into the basement.
    • Rainwater infiltration into the soil helps replenish underground water supplies.
    • The engineer tested the rate of water infiltration through the concrete barrier.
Antonyms