Longman Dictionary of Contemporary English homepage

dark

2 noun
     
dark2
1

the dark

when there is no light, especially because the sun has gone down:
my childish fear of the dark
in the dark
I turned off the light and lay there in the dark.
We stood outside in the pitch dark (=when there is no light at all).
2

after/before/until dark

TMC after, before, or until the sun goes down at night:
I want you home before dark.
3

in the dark

informal knowing nothing about something important, because you have not been told about it:
We're in the dark just as much as you are.
College officials were kept in the dark about the investigation.

➔ a shot in the dark

at shot1 (10)
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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