1. the quality or state of not being authentic; lack of genuineness or truthfulness
Usage: uncountable noun; formal

Examples

• The critic detected a certain inauthenticity in the artist's later works.
• She felt the inauthenticity of his apology and refused to accept it.
• The documentary exposed the inauthenticity of the historical claims made in the film.
• His constant inauthenticity made it difficult for others to trust him.
• The brand's inauthenticity became apparent when customers discovered the misleading marketing.
• Many people are drawn to minimalism as a reaction against the inauthenticity of consumer culture.