: to estimate or value (someone or something) too highly
… the senator had been so responsible about his potential tax liabilities that he had substantially overestimated what he owed the government. David Burnham
… our habit of overestimating our knowledge and underestimating our ignorance … David A. Shaywitz
The emotional power of this reunion can't be overestimated. Joe Klein
"I mean that I am afraid I overestimated him. I don't think that he is a painter of the first rank." Henry James