The phrase "significant intrusion" means a notable or important invasion or disturbance of someone's privacy, personal space, or peaceful existence. Full definition
The poorly rated Chrysler Town and Country and Nissan Quest saw significant intrusion into the passenger compartment - with the instrument panel, steering column and pedals being forced into the driver's legs, knees and feet. (motorweek.org)
Responsible for preventing significant intrusions by two groups that had successfully hacked other large retail networks. (resume-now.com)
The front - end structure crumpled in a way that spared the occupant compartment significant intrusion and preserved survival space for the driver. (iihs.org)