D defs.my
Entry 1 sense Webster, 1913

Fin de siècle

· Fin· de siè·cle · IPA /ˌfæn də siˈɛklə/
01 Lit., end of the century; -- mostly used adjectively in English to signify: belonging to, or characteristic of, the close of the 19th centu…
  1. 1.
    Lit., end of the century; -- mostly used adjectively in English to signify: belonging to, or characteristic of, the close of the 19th century. At that time the phrase was also intended to imply “modern” or “up-to-date;” as, fin-de-siècle ideas.