What does the word accession mean?

Usage examples for accession

  1. The only accession which the Roman empire received during the first century of the Christian era was the province of Britain. – The Ontario Readers: The High School Reader, 1886 by Ministry of Education
  2. William had a steady countenance, a stern brow, and a majestic walk; all of which this new accession, this holy calling to religious vows, rather increased than diminished. – Nature and Art by Mrs. Inchbald