- [uncountable] accession (to something)
the act of getting a position of rank or power （国家统治者的）就职，就任；（君主、帝王等的）登基，即位 the accession of Queen Victoria to the throne 维多利亚女王即位 Charles I’s accession to the throne 查理一世登基 on her accession to the leadership 她一当上领导
- [uncountable] accession (to something)
the act of becoming part of an international organization 正式加入（国际组织） the accession of new member states to the EU 新成员国正式加入欧盟 the new accession states of the EU 正式加入欧盟的新成员国
- [countable] (specialist)
a thing that is added to a collection of objects, paintings, etc. in a library or museum （图书馆、博物馆的）新增项目，新增藏品，新增藏书
Word Originlate 16th cent. (in the general sense ‘something added’): from Latin accessio(n-), from the verb accedere ‘approach, come to’ from ad- ‘to’ + cedere ‘give way, yield’.