under wraps

Idioms  

1. 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]

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Example Sentences

The letter named some high-profile investors who had agreed to participate, something usually kept under wraps.

From The Wall Street Journal • Apr. 10, 2026

The couple, who have kept their romance under wraps, were spotted together at the Khaite Fall/Winter 2026 fashion show during New York Fashion Week in February.

From Los Angeles Times • Apr. 8, 2026

They promised "viewers can expect explosive drama" but that "full details of Grant's comeback remain under wraps".

From BBC • Feb. 14, 2026

Details of his Super Bowl set are under wraps, though Bad Bunny has pledged to showcase Puerto Rican culture in "a huge party."

From Barron's • Feb. 8, 2026

In the meantime, it was best to keep everything under wraps.

From "Middlesex: A Novel" by Jeffrey Eugenides