References in common literature ? I gave the heap a shove over the lip in the entrance. The subsequent minute there came up from under a howl of rage. encroachment, intrusion, invasion - any entry into an area not previously occupied; "an invasion of holidaymakers"; "an invasion of locusts" area, https://entrancemats44556.dailyhitblog.com/43313419/getting-my-entrance-mats-to-work