ACCESSION definition: the act of coming into the possession of a right, title, office, etc.. See examples of accession used in a sentence.

The meaning of ACCESSION is the act or process by which someone rises to a position of honor or power. How to use accession in a sentence.

n. 1. The attainment of a dignity or rank: the queen's accession to the throne. 2. a. Something that has been acquired or added; an acquisition. b. An increase by means of something added.

accession noun (OBJECT COLLECTED) [ C ] an object, document, book, etc. that is added to a collection, for example by a museum or library:

Definition of accession noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

A country's accession to a group of countries or to an association is the joining of that country to the group of countries or association.

There are 13 meanings listed in OED's entry for the noun accession, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Accession refers to the act of acquiring, achieving, or succeeding to a position, rank, property, or privilege. It can also mean the addition of new materials to a library, museum, or similar collection. …

Jan 1, 2026 · accession (third-person singular simple present accessions, present participle accessioning, simple past and past participle accessioned) (transitive) To make a record of …

Accession definition: The attainment of a dignity or rank.