What is the meaning of the word "jack-in-the-box"?

Definitions:

  1. A children's toy consisting of a box with a crank and a spring-loaded mechanism inside. copy to clipboard NOUN
    • The jack-in-the-box toy is a classic gift for young children, providing them with hours of entertainment. copy to clipboard
  2. Plaything consisting of a toy clown that jumps out of a box when the lid is opened. copy to clipboard NOUN
    • The mechanism inside the jack-in-the-box creates a unique popping sound when the lid is opened, adding to its appeal. copy to clipboard

Synonyms: