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overestimate

[v. oh-ver-es-tuh-meyt; n. oh-ver-es-tuh-mit] /v. ˌoʊ vərˈɛs təˌmeɪt; n. ˈoʊ vərˈɛs tə mɪt/
verb (used with object), overestimated, overestimating.
1.
to estimate at too high a value, amount, rate, or the like:
Don't overestimate the car's trade-in value.
2.
to hold in too great esteem or to expect too much from:
Don't overestimate him—he's no smarter than you are.
noun
3.
an estimate that is too high.
Origin
1815-1825
1815-25; over- + estimate
Related forms
overestimation, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for over-estimation

overestimate

verb (ˌəʊvərˈɛstɪˌmeɪt)
1.
(transitive) to value or estimate too highly
noun (ˌəʊvərˈɛstɪmɪt)
2.
an estimate that is too high
Derived Forms
overestimation, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for over-estimation
n.

1793, noun of action from over-estimate (v.).

Online Etymology Dictionary, © 2010 Douglas Harper
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