1. the quality or state of being false, fake, or not genuine

Examples

• The spuriousness of the document became apparent after careful examination.
• Scientists questioned the spuriousness of the research findings.
• The lawyer exposed the spuriousness of the witness’s testimony.
• The spuriousness of his claims was evident to everyone in the room.
• Art experts detected the spuriousness of the supposedly ancient painting.
• The spuriousness of the advertisement’s promises led to consumer complaints.