Origin: Latin suffix -sion
Accession has 9 different meanings across 2 categories:
a process of increasing by addition (as to a collection or group)
"the art collection grew through accession"
(civil law) the right to all of that which your property produces whether by growth or improvement
"Under civil law, the new owner gains accession and is entitled to keep the crops that grow on the land they purchased."
the right to enter
"The prisoner waited for his legal accession into the secure facility before being processed."
the act of attaining or gaining access to a new office or right or position (especially the throne)
"Elizabeth's accession in 1558"
A coming to; the act of acceding and becoming joined
"The accession of new members strengthened the community's voice in local governance."
In plain English: Accession is when someone officially becomes part of a group, organization, or family after being accepted into it.
"The new president addressed the nation shortly after her accession to power."
Usage: Use this word primarily in formal contexts regarding someone assuming an official position or title, such as "the accession of the new king." Do not confuse it with similar-sounding words like "access," which refers to permission to enter or use something.
make a record of additions to a collection, such as a library
"The archivist spent the morning accessioning all the new books donated by the local community."
To make a record of (additions to a collection).
"The museum staff spent hours accessioning all the new artifacts donated by the local community."
In plain English: To accession means to officially accept something new into your collection, group, or family.
"The country signed the treaty and agreed to its accession by adding their name at the bottom."
The word comes from the Latin accessio, which is derived from the verb accēdō meaning "to come near." It first appeared in English in 1646 and shares a common origin with the French word accession.