What does the word declension mean?

Usage examples for declension

  1. Why this steady declension, with which, considering the character of Cecilia, the court sojourn can have had nothing to do? – The English Novel by George Saintsbury
  2. This declension of Christianity into a mere system of ethics, may partly be accounted for, as has been lately suggested; by considering the corruption of our nature, what Christianity is, and in what circumstances she has been placed in this country. – A Practical View of the Prevailing Religious System of Professed Christians, in the Middle and Higher Classes in this Country, Contrasted with Real Christianity. by William Wilberforce
  3. But that sin should be no longer held to be sin, that evil should be wrought and the worker experience no pang of shame, would surely indicate moral declension and decay. – Modern Substitutes for Christianity by Pearson McAdam Muir