Meaning of “overestimate” in the English Dictionary

"overestimate" in British English

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overestimateverb [ I or T ]

uk /ˌəʊ.vəˈres.tɪ.meɪt/ us /ˌoʊ.vɚˈes.tə.meɪt/
overestimate
noun [ C ] uk /ˌəʊ.vəˈres.tɪ.mət/ us /ˌoʊ.vɚˈes.tə.mət/

(Definition of “overestimate” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"overestimate" in American English

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overestimateverb [ I/T ]

us /ˌoʊ·vərˈes·təˌmeɪt/

to think that something is or will be greater, more extreme, or more important than it really is:

[ T ] I’m afraid Theresa is forever overestimating her strength.

(Definition of “overestimate” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"overestimate" in Business English

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overestimateverb

uk /ˌəʊvəˈrestɪmeɪt/ us

[ I or T ] to think that something is or will be greater or more important than it really is:

grossly/wildly overestimate I think we have grossly overestimated the pace of growth.
Most people overestimate what they can achieve in a day and underestimate what they can achieve in a year.
Assess your potential earnings honestly - don't overestimate.

[ T ] to think that someone is better at doing something, more intelligent, etc. than they really are:

I thought they would pick it up very quickly, but I overestimated them.
overestimation

Part of the problem was gross overestimation of ticket sales.

overestimatenoun [ C ]

uk /ˌəʊvəˈrestɪmət/ us

an opinion that something is larger or more important than it really is:

Experts put the figure at $6 million, though this may be an overestimate.

(Definition of “overestimate” from the Cambridge Business English Dictionary © Cambridge University Press)