irruption

Noun

countable uncountable broadly

Japanese Meaning

突入、侵入行為（乱入、無断で侵入する行為） / 激しい侵入または侵略の行為 / （生態学的に）動物個体群の急激な増加

The sudden irruption of protesters into the parliament stunned the nation.

抗議者たちの議会への突然の突入は国民を驚かせた。

Sense（1）

The action of irrupting or breaking into; a violent entry or invasion; an inbreaking; an intrusion.

The Trojan irruption into the Greek camp is related in Book XV of the Iliad.

Sense（2）

(ecology) An abrupt increase of an animal population.

Extreme rainfall events predict irruptions of rat plagues in central Australia.

Sense（3）

(by extension) An abrupt increase in the size of a movement or organization.

How can we explain this irruption of young people self-identifying as socialists?

irruptions

（ plural ）