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Noun: underestimation  ,ún-dur,es-tu'mey-shun [N. Amer], ,ún-du,res-ti'mey-shun [Brit]
  1. An estimation that is too low; an estimate that is less than the true or actual value
    - underestimate, underrating, underreckoning

Derived forms: underestimations

Type of: approximation, estimate, estimation, idea