overvaluation

from WordNet (r) 3.0 (2006)

overvaluation
    n 1: an appraisal that is too high [syn: {overestimate},
         {overestimation}, {overvaluation}, {overappraisal}]
    2: too high a value or price assigned to something

from The Collaborative International Dictionary of English v.0.48

Overvaluation \O"ver*val`u*a"tion\, n.
   Excessive valuation; overestimate.
   [1913 Webster]

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