fin de siecle Definition

noun

1. The end of the 19th century.
2. The end of the 20th century.

adj fin-de-siècle

1a. Characteristic of the ideas of the late 19th century, particularly of the Modernist movement and a decadent society;
1b. Decadent.
2. Referring or relating to the late 20th century.

Example: fin-de-siècle angst

Etymology: 19c: French, meaning ‘end of century or era'.