1. An official certification or note added to a document to authenticate or verify its origin, especially for use in international legal proceedings.
Usage: Also spelled 'apostille' (French spelling, more common in international contexts).; Legal/administrative term.

Examples

• The university issued an apostil on the diploma to certify its authenticity for international use.
• Many countries require an apostil on legal documents before they are recognized abroad.
• She obtained an apostil from the Secretary of State to validate her birth certificate for the visa application.
• The apostil serves as proof that the signature on the document is genuine.