overestimation
1. [ noun ] (writing) an appraisal that is too high
Synonyms: overvaluation overappraisal overestimate
Related terms: appraisal overestimate overvalue
2. [ noun ] (mathematics,psychology) a calculation that results in an estimate that is too high
Synonyms: overrating overreckoning overestimate
Related terms: estimate overestimate
Similar spelling:   overestimate
  overreaction
  overexertion
  overcritical
  overexploitation