definition of
accession

[1] #1 accession n. a process of increasing by addition (as to a collection or group); "the art collection grew through accession". wn

[2] #2 accession v. make a record of additions to a collection, such as a library. wn

[3] #3 accession n. (civil law) the right to all of that which your property produces whether by growth or improvement. wn

[4] #4 accession n. [addition] something added to what you already have; "the librarian shelved the new accessions"; "he was a new addition to the staff". wn

[5] #5 accession n. [assenting] agreeing with or consenting to (often unwillingly); "accession to such demands would set a dangerous precedent"; "assenting to the Congressional determination". wn