1. the quality or state of being delusional; the tendency to mislead or deceive
Usage: abstract noun derived from 'delusive'

Examples

• The delusiveness of the advertisement became clear once customers received the product.
• She warned against the delusiveness of quick-fix diets that promise overnight results.
• The magician's performance relied on the delusiveness of optical illusions.
• He struggled to see through the delusiveness of his own hopes.
• The report exposed the delusiveness of the company's financial claims.