Meaning : A process of increasing by addition (as to a collection or group).
Example :
The art collection grew through accession.
Meaning : (civil law) the right to all of that which your property produces whether by growth or improvement.
Meaning : Something added to what you already have.
Example :
The librarian shelved the new accessions.
He was a new addition to the staff.
Synonyms : addition
Meaning : Agreeing with or consenting to (often unwillingly).
Example :
Accession to such demands would set a dangerous precedent.
Assenting to the Congressional determination.
Synonyms : assenting
Meaning : The right to enter.
Synonyms : access, admission, admittance, entree
Meaning : The act of attaining or gaining access to a new office or right or position (especially the throne).
Example :
Elizabeth's accession in 1558.
Synonyms : rise to power