名詞 decadent:

1. a person who has fallen into a decadent state (morally or artistically)

形容詞 decadent:

1. marked by excessive self-indulgence and moral decay
   同義詞：effete

1. The decadent puppet regime was falling apart.
   那個腐朽的傀儡政權正在土崩瓦解。
2. The self-style decadent insists on lying down in the belief that he is hopelessly paralyzed.
   那自稱為頹廢派者，由于深信自己已毫無希望地全身麻痹而堅持要躺下來。
3. Many conservatives in the early 1900's thought impressionistic art was decadent.
   20世紀初，許多保守主義者認為印象派的藝術是頹廢的。

dec.a.dent

adj.（形容詞）
Being in a state of decline or decay.
衰落的：處于衰敗或腐敗的狀態(tài)的
Marked by or providing unrestrained gratification; self-indulgent.
墮落的：以放縱的滿足為特征的或提供放縱的滿足的；自我放縱的
Often Decadent Of or relating to literary Decadence.
常作 Decadent 頹廢派文藝的，與頹廢派文藝有關的
n.（名詞）
A person in a condition or process of mental or moral decay.
墮落者：在精神或道德方面處于衰敗狀態(tài)或過程中的人
Often Decadent A member of the Decadence movement.
常作 Decadent 頹廢派藝術家：頹廢派運動的一員

來源：
French décadent
法語 décadent
back-formation from décadence [decadence] * see decadence
源自 décadence的逆構詞 [墮落] *參見 decadence

【引伸】
dec.adently
adv.（副詞）