IPA: //əkˈsɛʃən//
KK: /ækˈsɛʃən/
The act of gaining entry or the right to use something. It can also refer to an increase or addition, especially in terms of property or value.
The accession of new members to the organization has strengthened its influence.
To add something to a collection or record, especially in a systematic way, such as when a museum includes new items.
The curator is accessioning the newly acquired paintings into the collection.
Past: accessioned
Past Participle: accessioned
Accession is formed from "ad-" (meaning to or toward) and "cedere" (meaning to go or yield). The word describes the act of going toward or yielding to a position or authority, often in the context of gaining a title or position.
Think of 'going toward' ('ad-') a new position or authority when you hear 'accession'.