An open secret is a concept or idea that is "officially" secret or restricted in knowledge, but is actually widely known; or refers to something which is widely known to be true, but which none of the people most intimately concerned are willing to categorically acknowledge in public.
Famous quotes containing the words open and/or secret:
“In that open field
If you do not come too close, if you do not come too close,
On a summer midnight, you can hear the music
Of the weak pipe and the little drum
And see them dancing around the bonfire
The association of man and woman
In daunsinge, signifying matrimonie....”
—T.S. (Thomas Stearns)
“The secret things belong to the LORD our God, but the revealed things belong to us and to our children forever, to observe all the words of this law.”
—Bible: Hebrew, Deuteronomy 29:29.