Etymology: < Latin irruptiōn-em, n. of action < irrump-ĕre
1. The action of bursting or breaking in; a violent entry, inroad, incursion, or invasion, esp. of a hostile force or tribe. spec. An abrupt local increase in the numbers of a species of animals.
"Several early pages are taken up by a musical score, but Chapter 13 is the revelation. It is structured by Jack Gaughan’s full-page illustrations, around and through which words must find their way. The images are the engine, organizing what language there is, invoking awe and, on the last page, an irruption of sudden textless terror. This is how you’ll discover modernism and its typographical games—not through concrete poetry but in this nastily visionary S.F. dystopia."
- China Miéville, "Forward thinking", 4 & 11 June 2012 The New Yorker