keep something, stay, etc. under wraps

stay under wraps

To remain secret; to not be disclosed to anyone. 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
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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
Farlex Partner Idioms Dictionary © Farlex 2017
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