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Synonyms

overrate

American  
[oh-ver-reyt] / ˌoʊ vərˈreɪt /

verb (used with object)

overrated, overrating
  1. to rate or appraise too highly; overestimate.

    I think you overrate their political influence.

    Synonyms:
    magnify, overpraise

overrate British  
/ ˌəʊvəˈreɪt /

verb

  1. (tr) to assess too highly

"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

Etymology

Origin of overrate

First recorded in 1580–90; over- + rate 1