noun
a calculation that results in an estimate that is too high
• Syn: ↑overestimate, ↑overestimation, ↑overrating
• Derivationally related forms: ↑overrate (for: ↑overrating), ↑overestimate (for: ↑overestimation), ↑overestimate (for: ↑overestimate)
• Hypernyms: ↑estimate, ↑estimation, ↑approximation, ↑idea
Useful english dictionary. 2012.