Overestimate | Mean of overestimate in English Dictionary

/ˌoʊvɚˈɛstəˌmeɪt/

• Verb
• to estimate (something) as being greater than the actual size, quantity, or number
1. I overestimated the number of chairs we would need for the party. [=I thought we would need more chairs than we actually did]
2. We overestimated the value of the coins.
• to think of (someone or something) as being greater in ability, influence, or value than that person or thing actually is
1. She overestimated his ability to do the job.
2. The importance of a good education cannot be overestimated. [=a good education is very important]