keep something, stay, etc. under wraps

stay under wraps

To remain secret; to not be disclosed to anyone else. I think it's best that this stays under wraps until we can determine what impact it will have on the public.
See also: stay, wrap

keep something, stay, etc. under ˈwraps

(informal) keep something, stay, etc. secret or hidden: These letters have lain under wraps since the 1960s.Next year’s event is still being kept under wraps.
See also: keep, wrap
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