ac‧ces‧sion/əkˈseʃən/ noun 1. [UNCOUNTABLE] an official process in which someone becomes king, queen, president etc ⇨ succession accession of ▪ the accession of James I accession to power/to the throne (=the act of becoming king, queen, president etc)
2. [UNCOUNTABLE] formal the act of agreeing to a demand
3. [COUNTABLE] technical an object or work of art that is added to a collection of objects or paintings
noun EXAMPLES FROM CORPUS ▪ A general right of accession would have created a major inroad into the continuing bilateralism of even multilateral treaties. ▪ Aldfrith appears to have been very much on the periphery of Northumbrian dynastic life before his accession. ▪ But in the circumstances of 1483 an immediate accession may have seemed to offer real advantages. ▪ Edward II's accession later that year accelerated his rise. ▪ He adds that the line between accession and adhesion is poorly defined.