a toy consisting of a box from which a little figure on a spring jumps up when the lid is lifted
nounpl. jack-in-the-box·es, or jacks-in-the-box
A toy consisting of a clownlike doll or other figure that is attached to the inside of a box and springs up when the lid is opened.
(plural jacks-in-boxes or jacks-in-the-boxes or jack-in-the-boxes or jacks-in-the-box)
- Children's toy where a figure pops out of a small box.