Wiktionary
phr. 1 Used to ask not to enter, e.g. a sign on a hotel room door. 2 Signs along the road to indicate this is a one way street.
Usage examples of "do not enter".
There is a saying, that those who enter there will die within a moon, even as the white man died in the cave upon the mountain, where ye found him, Macumazahn, and therefore the kings do not enter.
The Borg will just post a big Do Not Enter sign for themselves and leave it alone.
They stand on very short pedicels, into which spiral vessels do not enter, in which respect they differ from the tentacles of Drosera.
The royal chamber itself is the only area of the Nest that she and Kundalimon do not enter in this vision.
I do not enter discussions with neighbors who think they can forbid me to think.
Should the Dark Mark appear over any dwelling place or other building, DO NOT ENTER, but contact the Auror office immediately.