- 1[uncountable] accession (to something) the act of becoming a ruler of a country the accession of the queen to the throne see accede
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
- 2[uncountable] accession (to something) the act of becoming part of an international organization the accession of new member states to the EU in 2004
- 3[countable] (technology) a thing that is added to a collection of objects, paintings, etc. in a library or museum
Check pronunciation: accession