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Of or characteristic of the last part of the 19th century, especially with reference to its artistic climate of effete sophistication.
[French : fin, end + de, of + siècle, century.]
fin-de-siè•cle(Fr. fɛ̃ dəˈsyɛ klə)
of, pertaining to, or characteristic of the final years of the 19th century, esp. in Europe, and to the rarefied aestheticism and world-weary, somewhat decadent sophistication of its society, art, and literature.
[< French: end of the century]