1. the act of coming to or attaining a position of rank or power
2. the act of agreeing to or joining a treaty, organization, or agreement
Usage: formal
3. a new item added to a collection, especially in a library or museum
Usage: library science; museum studies

Examples

• The prince’s accession to the throne was celebrated throughout the kingdom.
• Her accession to the position of CEO marked a new era for the company.
• The country’s accession to the European Union required extensive negotiations.
• The treaty allowed for the accession of new member states.
• The library’s latest accession includes rare manuscripts from the 18th century.
• Museum staff carefully cataloged each new accession to the collection.
• The accession process for new members involves a thorough review.