From Longman Dictionary of Contemporary Englishdecadencedec‧a‧dence /ˈdekədəns/ noun [uncountable] BAD BEHAVIOUR OR ACTIONSbehaviour that shows that someone has low moral standards and is more concerned with pleasure than serious matters
Examples from the Corpus
decadence• It's full of blasphemy and decadence.• It encourages a cynical, destructive decadence.• Our age is not an age of decadence.• Female illiteracy, even in the well-off classes, is one of the characteristics of the decadence that led to colonization.• There is another dimension to the decadence of Britain and the Western world.Origin decadence (1700-1800) French décadence, from Latin decadere “to fall, sink” 