incursion incursion /ˌɪnˈkɝːʒən/

noun

1. () The act of entering some territory or domain (often in large numbers)  ( incursion )
   the act of entering some territory or domain (often in large numbers)
    The incursion of television into the American living room
   the incursion of television into the American living room
   
2. The mistake of incurring liability or blame  ( incursion )
   the mistake of incurring liability or blame
   
3. An attack that penetrates into enemy territory  ( incursion , penetration )
   an attack that penetrates into enemy territory