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Noun: incursion  in'kur-zhun
  1. The act of entering some territory or domain (often in large numbers)
    "the incursion of television into the American living room"
  2. An attack that penetrates into enemy territory
    - penetration
  3. The mistake of incurring liability or blame

Derived forms: incursions

Type of: attack, entering, entrance, entry, error, fault, incoming, ingress, mistake, onrush, onset, onslaught

Encyclopedia: Incursion, Part 2