A sudden violent entrance; a bursting in.

Roget 294: ingress; entrance, entry; introgression; influx, intrusion, inroad, incursion, invasion, irruption; ingression; penetration, interpenetration; illapse^†, import, infiltration; immigration; admission etc. (reception) 296; insinuation etc. (interjacence) 228^†; insertion etc. 300.    inlet; way in; mouth, door, etc. (opening) 260; barway^†; path etc. (way) 627; conduit etc. 350; immigrant.    ... show more

A sudden sharp increase in the relative numbers of a population.

A sudden violent spontaneous occurrence (usually of some undesirable condition).

synonyms: eruption, outbreak.

Roget 716: attack; assault, assault and battery; onset, onslaught, charge.    aggression, offense; incursion, inroad, invasion; irruption; outbreak; estrapade^†, ruade^†; coupe de main, sally, sortie, camisade^†, raid, foray; run at, run against; dead set at.    storm, storming; boarding, escalade^†; siege, investment, obsession^†, bombardment, cannonade.    fire, volley; platoon fire, file fire; fusillade; sharpshooting, broadside; raking fire, cross fire; volley of grapeshot, whiff of the grape, feu d'enfer [Fr.].    cut, thrust, lunge, pass, passado^†, carte and tierce [Fr.], home thrust; coupe de bec [Fr.]; kick, punch etc. (impulse) 276.    battue^†, razzia^†, Jacquerie, dragonnade^†; devastation etc. 162; eboulement [Fr.].    assailant, aggressor, invader.    base of operations, point of attack; echelon.    ... show more

Dutch: het uitbreken, explosie, uitbraak, uitbarsting