verb , noun
■ verb
/ ˌəʊvərˈestɪmeɪt; NAmE ˌoʊ-/ [ vn ] to estimate sth to be larger, better, more important, etc. than it really is :
They overestimated his ability when they promoted him.
The importance of these findings cannot be overestimated (= is very great) .
OPP underestimate
► over·esti·mation noun [ U , C ]
■ noun
/ ˌəʊvərˈestɪmət; NAmE ˌoʊ-/ [ usually sing. ] an estimate about the size, cost, etc. of sth that is too high
OPP underestimate