[v. es-tuh-meyt; n. es-tuh-mit, -meyt]
verb (used with object), estimated, estimating.
to form an approximate judgment or opinion regarding the worth, amount, size, weight, etc., of; calculate approximately: to estimate the cost of a college education.
to form an opinion of; judge.
verb (used without object), estimated, estimating.
to make an estimate.
an approximate judgment or calculation, as of the value, amount, time, size, or weight of something.
a judgment or opinion, as of the qualities of a person or thing.
a statement of the approximate charge for work to be done, submitted by a person or business firm ready to undertake the work.

1525–35; < Latin aestimātus, past participle of aestimāre to value, estimate; see -ate1

estimatingly, adverb
estimator, noun
preestimate, verb (used with object), preestimated, preestimating.
preestimate, noun
reestimate, verb (used with object), reestimated, reestimating.
reestimate, noun
self-estimate, noun
unestimated, adjective
well-estimated, adjective

1. compute, count, reckon, gauge, assess, value, evaluate, appraise. 4. valuation, calculation, appraisal. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
1.  to form an approximate idea of (distance, size, cost, etc); calculate roughly; gauge
2.  (tr; may take a clause as object) to form an opinion about; judge: to estimate one's chances
3.  to submit (an approximate price) for (a job) to a prospective client
4.  (tr) statistics See estimator to assign a value (a point estimate) or range of values (an interval estimate) to a parameter of a population on the basis of sampling statistics
5.  an approximate calculation
6.  a statement indicating the likely charge for or cost of certain work
7.  a judgment; appraisal; opinion
[C16: from Latin aestimāre to assess the worth of, of obscure origin]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1560s, from L. aestimatus, verbal noun from aestimare (see esteem). As a builder's statement of projected costs, from 1796.

1590s, "appraise the worth of," from L. aestimat-, pp. stem of aestimare (see esteem). Meaning "form an approximate notion" is from 1660s. Related: Estimated; estimates; estimating.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
By some estimates, one-fourth of the world catch is discarded each year.
Clouded leopards are so secretive that their current range can only be guessed
  at and population estimates vary widely.
Alas, estimates of the amount of oil already released keep growing, too.
Second, real-time data make for higher frequency estimates.
Related Words
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