1. an incorrect or mistaken assumption; a false belief accepted as true without proper evidence
Usage: formal; often used in academic or analytical contexts

Examples

• The study was flawed due to a fundamental misassumption about how the drug would interact with the body.
• Her argument rested on the misassumption that all participants had prior experience.
• The project failed because of a misassumption regarding the budget constraints.
• Many historical misassumptions have been corrected by modern research.
• The engineer's misassumption about load capacity led to structural problems.
• We need to identify and challenge any misassumptions before proceeding with the plan.