twilight zone

definition: the ambiguous region between two categories or states or conditions (usually containing some features of both)
example: but there is still a twilight zone, the tantalizing occurrences that are probably noise but might possibly be a signal
speech part: noun
synonyms: no man's land
definition: the lowest level of the ocean to which light can reach
example:
speech part: noun
synonyms:

How twilight zone is being used?