Meaning : Marked by excessive self-indulgence and moral decay.
Example :
A decadent life of excessive money and no sense of responsibility.
A group of effete self-professed intellectuals.
Synonyms : decadent
Meaning : Relating to or characteristic of the end of a century (especially the end of the 19th century).
Example :
Fin de siecle art.
Synonyms : fin de siecle