accession

 
Pronunciation: /əkˈsɛʃ(ə)n/

noun

  • 1 [mass noun] the attainment or acquisition of a position of rank or power: the Queen’s accession to the throne
  • the action or process of formally joining or being accepted by an institution or group: the accession of Spain and Portugal to the EU
  • the formal acceptance of a treaty or agreement: accession to the Treaty of Rome was effected in 1971
  • 2a new item added to an existing collection of books, paintings, or artefacts: the day-to-day work of cataloguing new accessions [as modifier]: the accession number
  • an amount added to an existing quantity of something: substantial accessions of gold

verb

[with object]
  • record the addition of (a new item) to a library, museum, or other collection: each book must be accessioned and the data entered into the computer

Origin:

late 16th century (in the general sense 'something added'): from Latin accessio(n-), from the verb accedere 'approach, come to' (see accede)