1. the quality or state of being exhausted of energy, vitality, or effectiveness; weakness or feebleness
2. the quality of being excessively refined, delicate, or decadent in a way that suggests moral or cultural decline

Examples

• The effeteness of the aging empire was evident in its inability to defend its borders.
• Critics accused the movement of intellectual effeteness and lack of substance.
• The effeteness that characterized the late period of the dynasty led to its eventual collapse.
• Some viewed the aristocracy's effeteness as a sign of cultural decay.
• The athlete's effeteness after months of injury concerned his coaches.
• The novel portrays the effeteness of a society obsessed with superficial pleasures.