Definition & Meaning of "[seal] {one's} fate"

What is the origin of the idiom "seal one's fate" and when to use it?

The origin of the idiom "seal one's fate" is rooted in the idea of making an outcome certain or inevitable, often with significant consequences. The word "seal" is used in the sense of finalizing or conclusively determining a result. This phrase is used to suggest that a particular decision, action, or event is so influential that it guarantees a specific outcome, often with far-reaching implications.