An entry into a place or area that was previously uncommon; an advance beyond former borders; intrusion; incursion.
That which is gained by such unlawful intrusion.
An intrusion upon another's possessions or rights; infringement.
An unlawful diminution of the possessions of another.
The action of irrupting or breaking into; a violent entry or invasion; an inbreaking; an intrusion.
An abrupt increase in the size of a movement or organization.
An abrupt increase of an animal population.