|Origin:||Latin, from incurrere; INCUR|
in‧cur‧sion [countable] formal
a sudden attack into an area that belongs to other people
a combined British and French incursion into China in 1857
the sudden arrival of something or someone into a place or activity where they do not belong or have not been before, used especially to say that they are not welcome
The media was criticized for its thoughtless incursion into the domestic grief of the family.
the Japanese incursion into the U.S. domestic electronics market