secret compartment

noun
UK /ˈsiː.krət kəmˈpɑːt.mənt/
US /ˈsiː.krət kəmˈpɑːrt.mənt/

A small hidden space where you can keep things safe.

He found a secret compartment under the floorboard where he kept his coins.


OTHER MEANINGS

2. A hidden section inside a piece of furniture or object.

The old desk had a secret compartment behind the drawer.

3. A private area kept away from others.

The attic served as a secret compartment for the children's games.

4. A concealed storage space in a vehicle or bag.

The suitcase has a secret compartment for passports.