1. accession

a process of increasing by addition (as to a collection or group)

Example Sentences:
'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

Example Sentences:
'the librarian shelved the new accessions'
'he was a new addition to the staff'

• addition

4. accession, assenting

agreeing with or consenting to (often unwillingly)

Example Sentences:
'accession to such demands would set a dangerous precedent'
'assenting to the Congressional determination'

• assenting

5. access, accession, admission, admittance, entree

the right to enter

• access
• admission
• admittance
• entree

6. accession, rise to power

the act of attaining or gaining access to a new office or right or position (especially the throne)

Example Sentences:
'Elizabeth's accession in 1558'

• rise to power

7. accession

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