A more thorough explanation:

Definition: Obsignation is a formal way of confirming or ratifying something, usually done with an official seal.

Example: When a legal document is signed and sealed by a notary public, it is considered to have undergone obsignation.

Explanation: The example illustrates how obsignation is used in a legal context. When a notary public seals a document, it confirms that the signatures on the document are genuine and that the document is legally binding. The seal acts as a formal ratification or confirmation of the document's authenticity. The term "obsignatory" is used to describe something that has undergone obsignation.