1. the act or instance of estimating something as greater in value, importance, quantity, or quality than it actually is
Usage: countable and uncountable

Examples

• The overestimation of the project's budget led to unnecessary spending.
• Her overestimation of her own abilities caused her to fail the difficult exam.
• The analyst's overestimation of market demand resulted in excess inventory.
• There was a significant overestimation of how many people would attend the event.
• The coach warned against overestimation of the team's chances against the defending champions.
• Financial overestimation can lead to poor investment decisions.
• His overestimation of the time needed meant he finished the task early.