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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
irruptive

adj. of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbro [syn: eruptive, plutonic]

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.