false bottom

noun

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

Word History and Origins

Origin of false bottom¹

First recorded in 1790–1800

Example Sentences

They might hide the products in a false bottom in a box.

From NewsForKids.net

You can create a false bottom in the seat.

From Seattle Times

But then Leonard took out the bottom of the trunk—it had been a false bottom.

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