[verb oh-ver-es-tuh-meyt; noun oh-ver-es-tuh-mit]

verb (used with object), o·ver·es·ti·mat·ed, o·ver·es·ti·mat·ing.

to estimate at too high a value, amount, rate, or the like: Don't overestimate the car's trade-in value.
to hold in too great esteem or to expect too much from: Don't overestimate him—he's no smarter than you are.


an estimate that is too high.

Nearby words

  1. overegg,
  2. overelaborate,
  3. overemphasis,
  4. overemphasize,
  5. overenthusiastic,
  6. overexcite,
  7. overexcited,
  8. overexert,
  9. overexpansion,
  10. overexpose

Origin of overestimate

First recorded in 1815–25; over- + estimate

Related formso·ver·es·ti·ma·tion, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for overestimate

British Dictionary definitions for overestimate


verb (ˌəʊvərˈɛstɪˌmeɪt)

(tr) to value or estimate too highly

noun (ˌəʊvərˈɛstɪmɪt)

an estimate that is too high
Derived Formsoverestimation, noun

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