Main Definition : An act of becoming a ruler of a country or becoming part of an international organization.
General definition : Something(s) getting added.
Ascension: it refers to act of going to heaven.
Its origin is the fact that the sixth Thursday after Easter Sunday is called Ascension Day, when Christians celebrate Christ's journey from Earth to heaven.
Usage of Accession:
1) The Queen's accession to the throne was celebrated with great pomp and splendor.
2) A list of accessions have been added to the library recently.
Usage of Acension:
1) Mother Teresa was conferred with sainthood after her ascension.