1. (

• accession

) a process of increasing by addition (as to a collection or group); "the art collection grew through accession" ;

2. (

• accession ,

) (civil law) the right to all of that which your property produces whether by growth or improvement ;

3. (

• accession ,
• addition

) something added to what you already have; "the librarian shelved the new accessions"; "he was a new addition to the staff" ;

4. (

• accession ,
• assenting

) agreeing with or consenting to (often unwillingly); "accession to such demands would set a dangerous precedent"; "assenting to the Congressional determination" ;

5. (

• entree ,
• access ,
• accession ,
• admission ,
• admittance

) the right to enter ;

6. (

• 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" ;

1. (

• accession

) make a record of additions to a collection, such as a library ;