false bottom

American  

noun

1. a horizontal partition above the actual bottom of a box, trunk, etc., especially one forming a secret compartment.

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Etymology

Origin of false bottom

First recorded in 1790–1800

Example Sentences

There are many ways to hinge the false bottom so it flips up when you need access.

From Seattle Times

It would stay there until he moved it to the trunk: the false bottom was built to match the Mona Lisa’s measurements.

From Literature

The “feet section” has a false bottom built into the rolling table the box is sitting on.

From Literature

The heart-stories behind the mailboxes are discreetly pasted, painted, hammered and welded into their forms like love letters secreted into the false bottom drawer of a writing desk.

From Seattle Times

Inside the bag, hidden in a false bottom, he showed them thousands of dollar bills.

From Literature