under wraps

Idioms and Phrases

Concealed or secret, as in The design for the new plant is under wraps . This idiom frequently is put as keep under wraps , meaning “keep secret,” as in Let's keep this theory under wraps until we've tested it sufficiently . It alludes to covering something completely by wrapping it up. [1930s]

Example Sentences

On Sunday, Good kept the details of Majors’ proposals — she said there were two of them — under wraps, simply telling E!,

From Los Angeles Times

However, this halftime show will be different and it's being kept under wraps.

From Salon

House Speaker Mike Johnson hopes to keep a report on Donald Trump's prospective attorney general under wraps.

From Salon

In previous years, piecemeal confirmation of the line-up has started in November, but the full rundown is typically kept under wraps until March.

From BBC

The producing duo, who have kept much of their private life under wraps, married in December 2016.

From Los Angeles Times