noun The act of joining or agreeing to something.
- The country's accession to the treaty was celebrated in the capital.
- Accession to the club requires approval from the committee.
- His accession to the agreement ended months of difficult negotiation.
- a king's accession to a confederacy
noun An increase made by adding something; the thing added.
- The company's accession of new land doubled the size of its farm.
- Each new accession to the herd was recorded by the farmer.
- The latest accession to our team brings valuable experience.
noun An item added to the collection of a museum or archive.
- The museum recorded every new accession in a large leather ledger.
- This painting is a recent accession to the national archive.
- Each accession is given a number and checked by the curator.
noun (law) A way of gaining ownership of something because it has grown or had something added to it, where the owner of the original thing becomes owner of the addition too, as long as it has not turned into something different.
- Under the rule of accession, the owner of the cow also owns its calf.
- The lawyer explained that accession gave the landowner the shed built on his plot.
- Accession did not apply because the paint had turned the object into something new.
