What is the definition of "alea iacta est"?
Alea iacta est is a Latin phrase attributed to Julius Caesar, which translates to "the die has been cast". It is used to signify that a decision has been made and cannot be reversed.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the definition of "alea iacta est"?

### Response:
Alea iacta est is a Latin phrase attributed to Julius Caesar, which translates to "the die has been cast". It is used to signify that a decision has been made and cannot be reversed.