Twilight zone

As to this right, therefore, the people have expressly created a twilight zone, in which neither nation nor state can act.

They were interesting because they represented a sort of twilight zone separating the "old days" from modern times.

...the classification scheme related to goods which lay in a "twilight zone" between consumer goods and equipment or between inventory and farm products.

But is there not a twilight zone over which both Church and State put forth claims?

Geographically speaking, the twilight zone encompasses those areas that lie between the central business district and the first ring of suburban shopping centers, many of which are comparatively obsolete.

Sometimes I think she's really a gym teacher twilight-zoned into the corridors of government. I'm always surprised to see that it's a gold, clipless Cross pen she's carrying and not a gym whistle.

"I've been distant and into myself all night," I said. "The kids say I get twilight zoned."

Oh, I can't talk right now, Duke. I'm in the twilight zone.

Ground controllers were uncertain for some agonizing hours what had happened to the spacecraft [...] "We have entered the twilight zone," dead-panned one jaded engineer.

Suddenly, to her astonishment and mine, it turned black and blue! I wondered if we'd just entered the twilight zone.