be in the know
to have knowledge about something which most people do not have
in the know
having more information about something than most people

[TahlilGaran] Dictionary of Contemporary English ▲

in the know
having more information about something than most other people.
People in the know go there for the best skiing in the east.

[TahlilGaran] English Idioms Dictionary ▲

in the know
knowledgeable
I don't think that our teacher is in the know about the problems in the other classes.

[TahlilGaran] English Idioms Dictionary ▲

in the know
adj. phr., informal Knowing about things that most people do not know about; knowing secrets or understanding a special subject.
Tina helped Professor Smith make some of the exam questions, and she felt important to be in the know.
In a print shop, Mr. Harvey is in the know, but in a kitchen he can't even cook an egg.
Compare: GET WISE.
Antonym: IN THE DARK.

[TahlilGaran] English Idioms Dictionary ▲