open secret

1. 1.

   something that is supposed to be secret but is generally known

   “their love affair was an open secret”

   Broadersecret

Questions about open secret

What does open secret mean?

open secret means "something that is supposed to be secret but is generally known".

Is open secret a common word?

open secret is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.