The Collaborative International Dictionary
Irruptive
Irruptive \Ir*rup"tive\, a. Rushing in or upon.
Wiktionary
irruptive
a. Having the quality of irrupt or making irruption.
WordNet
Usage examples of "irruptive".
The same is true of the Asian irruptive locus, with the North Siberian, Mongol, and Hokkaido groups most noteworthy, together with the isolate fracĀtions flourishing in Tibet and Finland.
I forgot that this part of the world was one of the prime irruptive metapsychic foci.