Definitions:

1. a process of increasing by addition to a collection or group noun
   • My art collection grew through accession.
2. agreeing with or consenting to (often unwillingly) noun
   • accession to such demands would set a dangerous precedent
3. something added to what you already have noun
   • the librarian shelved the new accessions
4. the act of attaining or gaining access to a new office or right or position (especially the throne) noun
   • Elizabeth's accession in 1558
5. to make a record of additions to a collection, such as a library verb
   • The shipment arrived, leaving me to accession the new books.

Synonyms:

• addition
• assenting
• entree
• rise to power

NearBy Words:

• accessional