A more thorough explanation:

Definition:stash, verb. To hide or conceal (money or property).

Example 1: He stashed his cash in a secret compartment in his backpack.

Example 2: She stashed her jewelry in a safe deposit box at the bank.

Explanation: The term "stash" refers to the act of hiding or concealing something valuable, such as money or property. In example 1, the person hides their cash in a secret compartment in their backpack, which is a way of stashing it. In example 2, the person puts their jewelry in a safe deposit box at the bank, which is another way of stashing it. Both examples illustrate the definition of "stash" because they involve hiding or concealing something valuable.