/in kerr"zheuhn, -sheuhn/ , n.
1. a hostile entrance into or invasion of a place or territory, esp. a sudden one; raid: The bandits made brief incursions on the village.
2. a harmful inroad.
3. a running in: the incursion of sea water.
[ 1400-50; late ME incursion- (s. of incursio ) raid, equiv. to incurs ( us ) (ptp. of incurrere to INCUR) + -ion- -ION; see EXCURSION ]
Syn. 1. sortie, foray, attack.