Under wraps.
[Idiom] UNDER WRAPS. - Discover the Art of Secrecy with Timeless Expressions
To keep something secret.
Keeping something "under wraps" means to keep it a secret or hidden from public view. The phrase originally relates to wrapping something up to conceal it. In common usage, it’s about confidentiality, ensuring that information doesn’t leak out before it’s appropriate to reveal it, such as a surprise party or a new product launch.
Example Sentences
They kept the project under wraps until the launch date.
They didn't reveal the project details until the launch date.
The movie details are still under wraps.
The movie details are still being kept secret.
We must keep these financial records under wraps to avoid leaks.
We must keep these financial records confidential to avoid leaks.