accession -- (a process of increasing by addition (as to a collection or group); "the art collection grew through accession")
accession -- ((civil law) the right to all of that which your property produces whether by growth or improvement)
accession, addition -- (something added to what you already have; "the librarian shelved the new accessions"; "he was a new addition to the staff")
accession, assenting -- (agreeing with or consenting to (often unwillingly); "accession to such demands would set a dangerous precedent"; "assenting to the Congressional determination")
accession, rise to power -- (the act of attaining or gaining access to a new office or right or position (especially the throne); "Elizabeth's accession in 1558")
Overview of verb accession
The verb accession has 1 sense
accession -- (make a record of additions to a collection, such as a library)